diff --git a/.gitignore b/.gitignore
index 64a6c9407..4cfa8f5cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -358,4 +358,6 @@ combine.log
 
 package-lock.json
 
-!example.env
\ No newline at end of file
+!example.env
+
+database/
\ No newline at end of file
diff --git a/nodemon.json b/nodemon.json
new file mode 100644
index 000000000..053fde7d6
--- /dev/null
+++ b/nodemon.json
@@ -0,0 +1,5 @@
+{
+  "watch": ["src"],
+  "ext": "ts",
+  "exec": "concurrently \"npx tsc --watch\" \"ts-node src/server.ts\""
+}
diff --git a/package.json b/package.json
index c8deb9bdc..b2f38206c 100644
--- a/package.json
+++ b/package.json
@@ -2,14 +2,14 @@
   "name": "migration-v2-node-server",
   "version": "1.0.0",
   "description": "This is the TSO migration V2's node server",
-  "main": "index.js",
+  "exports": "./src/server.ts",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "npx tsc && NODE_ENV=production node dist/server.js",
-    "dev": "NODE_ENV=development ts-node-dev --respawn ./src/server.ts",
+    "build": "npx tsc",
+    "start": "NODE_ENV=production node dist/server.js",
+    "dev": "NODE_ENV=development tsx watch ./src/server.ts",
     "precommit": "lint-staged --concurrent false"
   },
-  "type": "commonjs",
+  "type": "module",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/contentstack-expert-services/migration-v2-node-server.git"
@@ -21,7 +21,6 @@
   },
   "homepage": "https://github.com/contentstack-expert-services/migration-v2-node-server#readme",
   "dependencies": {
-    "@types/express": "^4.17.21",
     "axios": "^1.6.5",
     "cors": "^2.8.5",
     "dotenv": "^16.3.1",
@@ -30,12 +29,15 @@
     "express-winston": "^4.2.0",
     "helmet": "^7.1.0",
     "jsonwebtoken": "^9.0.2",
+    "lowdb": "^7.0.1",
     "mongoose": "^8.0.4",
     "winston": "^3.11.0"
   },
   "devDependencies": {
     "@types/cors": "^2.8.17",
+    "@types/express": "^4.17.21",
     "@types/jsonwebtoken": "^9.0.5",
+    "@types/lodash": "^4.17.0",
     "@types/node": "^20.10.4",
     "@typescript-eslint/eslint-plugin": "^6.15.0",
     "@typescript-eslint/parser": "^6.15.0",
@@ -44,10 +46,10 @@
     "eslint-config-prettier": "^8.3.0",
     "husky": "^4.3.8",
     "lint-staged": "^15.2.2",
+    "lodash": "^4.17.21",
     "nodemon": "^3.0.2",
     "prettier": "^2.4.1",
-    "ts-node": "^10.9.2",
-    "ts-node-dev": "^2.0.0",
+    "tsx": "^4.7.1",
     "typescript": "^5.3.3",
     "validate-branch-name": "^1.3.0"
   },
diff --git a/src/config/index.ts b/src/config/index.ts
index f1af5e87d..b6cb636eb 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -1,7 +1,7 @@
 import dotenv from "dotenv";
 import path from "path";
-import { prodConfig } from "./prod.config";
-import { devConfig } from "./dev.config";
+import { prodConfig } from "./prod.config.js";
+import { devConfig } from "./dev.config.js";
 
 dotenv.config({
   path: path.resolve(process.cwd(), `${process.env.NODE_ENV}.env`),
diff --git a/src/constants/index.ts b/src/constants/index.ts
index b6f9a304f..422a29407 100644
--- a/src/constants/index.ts
+++ b/src/constants/index.ts
@@ -37,6 +37,10 @@ export const HTTP_TEXTS = {
   PROJECT_CREATION_FAILED: "Error occurred while creating project.",
   NO_PROJECT: "resource not found with the given ID(s).",
   AFFIX_UPDATED: "Project's Affix updated successfully",
+  AFFIX_CONFIRMATION_UPDATED:
+    "Project's Affix confirmation updated successfully",
+  FILEFORMAT_CONFIRMATION_UPDATED:
+    "Project's Fileformat confirmation updated successfully",
   CMS_UPDATED: "Project's migration cms updated successfully",
   FILE_FORMAT_UPDATED: "Project's migration file format updated successfully",
   DESTINATION_STACK_UPDATED:
@@ -81,6 +85,7 @@ export const VALIDATION_ERRORS = {
   EMAIL_LIMIT: "Email's max limit reached.",
   LENGTH_LIMIT: "$'s max limit reached.",
   STRING_REQUIRED: "Provided $ should be a string.",
+  BOOLEAN_REQUIRED: "Provided $ should be a boolean.",
   INVALID_REGION: "Provided region doesn't exists.",
   FIELD_REQUIRED: "Field '$' is required.",
   INVALID_AFFIX: "Invalid affix format",
diff --git a/src/controllers/auth.controller.ts b/src/controllers/auth.controller.ts
index 4537961fd..55e092e11 100644
--- a/src/controllers/auth.controller.ts
+++ b/src/controllers/auth.controller.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { authService } from "../services/auth.service";
+import { authService } from "../services/auth.service.js";
 
 const login = async (req: Request, res: Response) => {
   const resp = await authService.login(req);
diff --git a/src/controllers/org.controller.ts b/src/controllers/org.controller.ts
index 9cf5b46e6..75809a905 100644
--- a/src/controllers/org.controller.ts
+++ b/src/controllers/org.controller.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { orgService } from "../services/org.service";
+import { orgService } from "../services/org.service.js";
 
 const getAllStacks = async (req: Request, res: Response) => {
   const resp = await orgService.getAllStacks(req);
diff --git a/src/controllers/projects.contentMapper.controller.ts b/src/controllers/projects.contentMapper.controller.ts
index a706d3881..eb0c6ea29 100644
--- a/src/controllers/projects.contentMapper.controller.ts
+++ b/src/controllers/projects.contentMapper.controller.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { contentMapperService } from "../services/contentMapper.service";
+import { contentMapperService } from "../services/contentMapper.service.js";
 const putTestData = async (req: Request, res: Response): Promise<void> => {
   const resp = await contentMapperService.putTestData(req);
   res.status(200).json(resp);
diff --git a/src/controllers/projects.controller.ts b/src/controllers/projects.controller.ts
index 01d38bded..c110d1d64 100644
--- a/src/controllers/projects.controller.ts
+++ b/src/controllers/projects.controller.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { projectService } from "../services/projects.service";
+import { projectService } from "../services/projects.service.js";
 
 const getAllProjects = async (req: Request, res: Response): Promise<void> => {
   const allProjects = await projectService.getAllProjects(req);
@@ -36,11 +36,21 @@ const updateAffix = async (req: Request, res: Response) => {
   res.status(resp.status).json(resp.data);
 };
 
+const affixConfirmation = async (req: Request, res: Response) => {
+  const resp = await projectService.affixConfirmation(req);
+  res.status(resp.status).json(resp.data);
+};
+
 const updateFileFormat = async (req: Request, res: Response) => {
   const resp = await projectService.updateFileFormat(req);
   res.status(resp.status).json(resp.data);
 };
 
+const fileformatConfirmation = async (req: Request, res: Response) => {
+  const resp = await projectService.fileformatConfirmation(req);
+  res.status(resp.status).json(resp.data);
+};
+
 const updateDestinationStack = async (req: Request, res: Response) => {
   const resp = await projectService.updateDestinationStack(req);
   res.status(resp.status).json(resp.data);
@@ -63,7 +73,9 @@ export const projectController = {
   updateProject,
   updateLegacyCMS,
   updateAffix,
+  affixConfirmation,
   updateFileFormat,
+  fileformatConfirmation,
   updateDestinationStack,
   updateCurrentStep,
   deleteProject,
diff --git a/src/controllers/user.controller.ts b/src/controllers/user.controller.ts
index 07bfd36a9..d74936372 100644
--- a/src/controllers/user.controller.ts
+++ b/src/controllers/user.controller.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { userService } from "../services/user.service";
+import { userService } from "../services/user.service.js";
 
 const getUserProfile = async (req: Request, res: Response) => {
   const resp = await userService.getUserProfile(req);
diff --git a/src/database.ts b/src/database.ts
index 177315772..b98dd28a8 100644
--- a/src/database.ts
+++ b/src/database.ts
@@ -1,11 +1,12 @@
 // database.ts
 import mongoose from "mongoose";
-import { config } from "./config";
-import logger from "./utils/logger";
-import ProjectModel from "./models/project";
-import AuthenticationModel from "./models/authentication";
-import ContentTypesMapperModel from "./models/contentTypesMapper";
-import FieldMapperModel from "./models/FieldMapper";
+import { config } from "./config/index.js";
+import logger from "./utils/logger.js";
+import ProjectModel from "./models/project.js";
+// import AuthenticationModel from "./models/authentication.js";
+import ContentTypesMapperModel from "./models/contentTypesMapper.js";
+import FieldMapperModel from "./models/FieldMapper.js";
+import fs from "fs";
 
 const connectToDatabase = async () => {
   try {
@@ -13,11 +14,14 @@ const connectToDatabase = async () => {
       ...(config.APP_ENV === "production" ? { autoIndex: false } : {}),
     });
 
-    logger.info("Connected to MongoDB");
+    //check if the database folder exists
+    if (!fs.existsSync("./database")) {
+      fs.mkdirSync("./database");
+    }
 
     // Create the collection's if it doesn't exist
     await ProjectModel.init();
-    await AuthenticationModel.init();
+    // const AuthenticationModel = await AuthenticationDb;
     await ContentTypesMapperModel.init();
     await FieldMapperModel.init();
   } catch (error) {
diff --git a/src/middlewares/auth.middleware.ts b/src/middlewares/auth.middleware.ts
index 1223d204b..17987a3eb 100644
--- a/src/middlewares/auth.middleware.ts
+++ b/src/middlewares/auth.middleware.ts
@@ -1,8 +1,8 @@
 // middleware/authentication.middleware.ts
 import { Request, Response, NextFunction } from "express";
 import jwt from "jsonwebtoken";
-import { config } from "../config";
-import { HTTP_CODES } from "../constants";
+import { config } from "../config/index.js";
+import { HTTP_CODES } from "../constants/index.js";
 
 export const authenticateUser = (
   req: Request,
diff --git a/src/middlewares/auth.migration.middleware.ts b/src/middlewares/auth.migration.middleware.ts
index c6b8b482b..51216d70b 100644
--- a/src/middlewares/auth.migration.middleware.ts
+++ b/src/middlewares/auth.migration.middleware.ts
@@ -1,6 +1,6 @@
 import { Request, Response, NextFunction } from "express";
-import { HTTP_CODES } from "../constants";
-import { config } from "../config";
+import { HTTP_CODES } from "../constants/index.js";
+import { config } from "../config/index.js";
 
 export const authenticateMigrationService = (
   req: Request,
diff --git a/src/middlewares/auth.uploadService.middleware.ts b/src/middlewares/auth.uploadService.middleware.ts
index e6a5dc544..c23458493 100644
--- a/src/middlewares/auth.uploadService.middleware.ts
+++ b/src/middlewares/auth.uploadService.middleware.ts
@@ -1,6 +1,6 @@
 import { Request, Response, NextFunction } from "express";
-import { HTTP_CODES } from "../constants";
-import { config } from "../config";
+import { HTTP_CODES } from "../constants/index.js";
+import { config } from "../config/index.js";
 
 export const authenticateUploadService = (
   req: Request,
diff --git a/src/middlewares/error.middleware.ts b/src/middlewares/error.middleware.ts
index 0ad687959..199152893 100644
--- a/src/middlewares/error.middleware.ts
+++ b/src/middlewares/error.middleware.ts
@@ -1,6 +1,6 @@
 import { Request, Response, NextFunction } from "express";
-import { AppError } from "../utils/custom-errors.utils";
-import logger from "../utils/logger";
+import { AppError } from "../utils/custom-errors.utils.js";
+import logger from "../utils/logger.js";
 
 export const errorMiddleware = (
   err: Error,
diff --git a/src/middlewares/logger.middleware.ts b/src/middlewares/logger.middleware.ts
index ff260975d..0ccecbf70 100644
--- a/src/middlewares/logger.middleware.ts
+++ b/src/middlewares/logger.middleware.ts
@@ -1,5 +1,5 @@
 import expressWinston from "express-winston";
-import logger from "../utils/logger";
+import logger from "../utils/logger.js";
 
 //Logger Middleware to log every request
 const loggerMiddleware = expressWinston.logger({
diff --git a/src/middlewares/unmatched-routes.middleware.ts b/src/middlewares/unmatched-routes.middleware.ts
index d7fdee816..02cd8530a 100644
--- a/src/middlewares/unmatched-routes.middleware.ts
+++ b/src/middlewares/unmatched-routes.middleware.ts
@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { HTTP_CODES, HTTP_TEXTS } from "../constants";
+import { HTTP_CODES, HTTP_TEXTS } from "../constants/index.js";
 
 export const unmatchedRoutesMiddleware = (req: Request, res: Response) => {
   const status = HTTP_CODES.NOT_FOUND;
diff --git a/src/models/authentication.ts b/src/models/authentication.ts
index b82e1088c..8672d9a70 100644
--- a/src/models/authentication.ts
+++ b/src/models/authentication.ts
@@ -1,26 +1,27 @@
 // src/models/Authentication.ts
+import { Low } from "lowdb";
+import { JSONFile } from "lowdb/node";
+import lodash from "lodash";
 
-import { Schema, model, Document } from "mongoose";
-import { CS_REGIONS } from "../constants";
+class LowWithLodash<T> extends Low<T> {
+  chain: lodash.ExpChain<this["data"]> = lodash.chain(this).get("data");
+}
 
-interface AuthenticationDocument extends Document {
-  user_id: string;
-  region: string;
-  authtoken: string;
+interface AuthenticationDocument {
+  users: {
+    user_id: string;
+    region: string;
+    authtoken: string;
+    created_at: string;
+    updated_at: string;
+  }[];
 }
 
-const authenticationSchema = new Schema<AuthenticationDocument>(
-  {
-    user_id: { type: String, required: true },
-    region: { type: String, required: true, enum: CS_REGIONS },
-    authtoken: { type: String, required: true },
-  },
-  { timestamps: { createdAt: "created_at", updatedAt: "updated_at" } }
-);
+const defaultData: AuthenticationDocument = { users: [] };
 
-const AuthenticationModel = model<AuthenticationDocument>(
-  "Authentication",
-  authenticationSchema
+const db = new LowWithLodash(
+  new JSONFile<AuthenticationDocument>("database/authentication.json"),
+  defaultData
 );
 
-export default AuthenticationModel;
+export default db;
diff --git a/src/models/project.ts b/src/models/project.ts
index 327dc587f..b4137dd54 100644
--- a/src/models/project.ts
+++ b/src/models/project.ts
@@ -5,12 +5,14 @@ import {
   PREDEFINED_STEPS,
   PROJECT_STATUS,
   STEPPER_STEPS,
-} from "../constants";
+} from "../constants/index.js";
 
 interface LegacyCMS {
   cms: string;
   affix: string;
+  affix_confirmation: boolean;
   file_format: string;
+  file_format_confirmation: boolean;
   file: {
     id: string;
     name: string;
@@ -70,7 +72,9 @@ const projectSchema = new Schema<ProjectDocument>(
     legacy_cms: {
       cms: { type: String },
       affix: { type: String },
+      affix_confirmation: { type: Boolean },
       file_format: { type: String },
+      file_format_confirmation: { type: Boolean },
       file: {
         id: { type: String },
         name: { type: String },
diff --git a/src/routes/auth.routes.ts b/src/routes/auth.routes.ts
index bf162718e..29608bca9 100644
--- a/src/routes/auth.routes.ts
+++ b/src/routes/auth.routes.ts
@@ -1,7 +1,7 @@
 import express from "express";
-import { authController } from "../controllers/auth.controller";
-import { asyncRouter } from "../utils/async-router.utils";
-import validator from "../validators";
+import { authController } from "../controllers/auth.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
+import validator from "../validators/index.js";
 
 const router = express.Router();
 
diff --git a/src/routes/contentMapper.routes.ts b/src/routes/contentMapper.routes.ts
index 2975302bf..57d90bbcf 100644
--- a/src/routes/contentMapper.routes.ts
+++ b/src/routes/contentMapper.routes.ts
@@ -1,6 +1,6 @@
 import express from "express";
-import { contentMapperController } from "../controllers/projects.contentMapper.controller";
-import { asyncRouter } from "../utils/async-router.utils";
+import { contentMapperController } from "../controllers/projects.contentMapper.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
 
 const router = express.Router({ mergeParams: true });
 
diff --git a/src/routes/migrationMidlleware.routes.ts b/src/routes/migrationMidlleware.routes.ts
index 516a9057b..278041113 100644
--- a/src/routes/migrationMidlleware.routes.ts
+++ b/src/routes/migrationMidlleware.routes.ts
@@ -1,6 +1,6 @@
 import express from "express";
-import { projectController } from "../controllers/projects.controller";
-import { asyncRouter } from "../utils/async-router.utils";
+import { projectController } from "../controllers/projects.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
 
 const router = express.Router({ mergeParams: true });
 
diff --git a/src/routes/org.routes.ts b/src/routes/org.routes.ts
index c06a0654d..8d8429ca7 100644
--- a/src/routes/org.routes.ts
+++ b/src/routes/org.routes.ts
@@ -1,7 +1,7 @@
 import express from "express";
-import { orgController } from "../controllers/org.controller";
-import { asyncRouter } from "../utils/async-router.utils";
-import validator from "../validators";
+import { orgController } from "../controllers/org.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
+import validator from "../validators/index.js";
 
 const router = express.Router({ mergeParams: true });
 
diff --git a/src/routes/projects.routes.ts b/src/routes/projects.routes.ts
index d29c8b256..7450e467b 100644
--- a/src/routes/projects.routes.ts
+++ b/src/routes/projects.routes.ts
@@ -1,7 +1,7 @@
 import express from "express";
-import { projectController } from "../controllers/projects.controller";
-import { asyncRouter } from "../utils/async-router.utils";
-import validator from "../validators";
+import { projectController } from "../controllers/projects.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
+import validator from "../validators/index.js";
 
 const router = express.Router({ mergeParams: true });
 
@@ -31,6 +31,13 @@ router.put(
   asyncRouter(projectController.updateAffix)
 );
 
+// Update project's Affix confirmation
+router.put(
+  "/:projectId/affix_confirmation",
+  validator("affix_confirmation_validator"),
+  asyncRouter(projectController.affixConfirmation)
+);
+
 // Update project's file format
 router.put(
   "/:projectId/file-format",
@@ -38,6 +45,13 @@ router.put(
   asyncRouter(projectController.updateFileFormat)
 );
 
+// Update project's fileformat confirmation
+router.put(
+  "/:projectId/fileformat_confirmation",
+  validator("fileformat_confirmation_validator"),
+  asyncRouter(projectController.fileformatConfirmation)
+);
+
 // Update project's destination-cms
 router.put(
   "/:projectId/destination-stack",
diff --git a/src/routes/user.routes.ts b/src/routes/user.routes.ts
index b69bc2d03..6e4e0bd48 100644
--- a/src/routes/user.routes.ts
+++ b/src/routes/user.routes.ts
@@ -1,6 +1,6 @@
 import express from "express";
-import { userController } from "../controllers/user.controller";
-import { asyncRouter } from "../utils/async-router.utils";
+import { userController } from "../controllers/user.controller.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
 
 const router = express.Router();
 
diff --git a/src/server.ts b/src/server.ts
index 03b488c03..d843c109e 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -1,22 +1,22 @@
 // file deepcode ignore UseCsurfForExpress: We've app_token for all the API calls, so we don't need CSRF token.
-import { config } from "./config";
+import { config } from "./config/index.js";
 import express from "express";
 import cors from "cors";
 import helmet from "helmet";
-import authRoutes from "./routes/auth.routes";
-import userRoutes from "./routes/user.routes";
-import projectRoutes from "./routes/projects.routes";
-import orgRoutes from "./routes/org.routes";
-import { errorMiddleware } from "./middlewares/error.middleware";
-import loggerMiddleware from "./middlewares/logger.middleware";
-import connectToDatabase from "./database";
-import { authenticateUser } from "./middlewares/auth.middleware";
-import { requestHeadersMiddleware } from "./middlewares/req-headers.middleware";
-import { unmatchedRoutesMiddleware } from "./middlewares/unmatched-routes.middleware";
-import logger from "./utils/logger";
-import contentMapperRoutes from "./routes/contentMapper.routes";
-import migrationMidllewareRoutes from "./routes/migrationMidlleware.routes";
-import { authenticateMigrationService } from "./middlewares/auth.migration.middleware";
+import authRoutes from "./routes/auth.routes.js";
+import userRoutes from "./routes/user.routes.js";
+import projectRoutes from "./routes/projects.routes.js";
+import orgRoutes from "./routes/org.routes.js";
+import { errorMiddleware } from "./middlewares/error.middleware.js";
+import loggerMiddleware from "./middlewares/logger.middleware.js";
+import connectToDatabase from "./database.js";
+import { authenticateUser } from "./middlewares/auth.middleware.js";
+import { requestHeadersMiddleware } from "./middlewares/req-headers.middleware.js";
+import { unmatchedRoutesMiddleware } from "./middlewares/unmatched-routes.middleware.js";
+import logger from "./utils/logger.js";
+import contentMapperRoutes from "./routes/contentMapper.routes.js";
+import migrationMidllewareRoutes from "./routes/migrationMidlleware.routes.js";
+import { authenticateMigrationService } from "./middlewares/auth.migration.middleware.js";
 
 try {
   const app = express();
diff --git a/src/services/auth.service.ts b/src/services/auth.service.ts
index d2ca2065f..ea8fda273 100644
--- a/src/services/auth.service.ts
+++ b/src/services/auth.service.ts
@@ -1,17 +1,17 @@
 import { Request } from "express";
-import { config } from "../config";
-import { safePromise, getLogMessage } from "../utils";
-import https from "../utils/https.utils";
-import { LoginServiceType, AppTokenPayload } from "../models/types";
-import { HTTP_CODES, HTTP_TEXTS } from "../constants";
-import { generateToken } from "../utils/jwt.utils";
+import { config } from "../config/index.js";
+import { safePromise, getLogMessage } from "../utils/index.js";
+import https from "../utils/https.utils.js";
+import { LoginServiceType, AppTokenPayload } from "../models/types.js";
+import { HTTP_CODES, HTTP_TEXTS } from "../constants/index.js";
+import { generateToken } from "../utils/jwt.utils.js";
 import {
   BadRequestError,
   InternalServerError,
   ExceptionFunction,
-} from "../utils/custom-errors.utils";
-import AuthenticationModel from "../models/authentication";
-import logger from "../utils/logger";
+} from "../utils/custom-errors.utils.js";
+import AuthenticationModel from "../models/authentication.js";
+import logger from "../utils/logger.js";
 
 const login = async (req: Request): Promise<LoginServiceType> => {
   const srcFun = "Login";
@@ -63,15 +63,25 @@ const login = async (req: Request): Promise<LoginServiceType> => {
     };
 
     // Saving auth info in the DB
-    await AuthenticationModel.findOneAndUpdate(
-      appTokenPayload,
-      {
-        authtoken: res?.data.user?.authtoken,
-      },
-      {
-        upsert: true,
+    AuthenticationModel.read();
+    const userIndex = AuthenticationModel.chain
+      .get("users")
+      .findIndex(appTokenPayload)
+      .value();
+
+    AuthenticationModel.update((data: any) => {
+      if (userIndex < 0) {
+        data.users.push({
+          ...appTokenPayload,
+          authtoken: res?.data.user?.authtoken,
+          updated_at: new Date().toISOString(),
+          created_at: new Date().toISOString(),
+        });
+      } else {
+        data.users[userIndex].authtoken = res?.data.user?.authtoken;
+        data.users[userIndex].updated_at = new Date().toISOString();
       }
-    );
+    });
 
     // JWT token generation
     const app_token = generateToken(appTokenPayload);
diff --git a/src/services/contentMapper.service.ts b/src/services/contentMapper.service.ts
index 3a995d3cc..47a9aa58e 100644
--- a/src/services/contentMapper.service.ts
+++ b/src/services/contentMapper.service.ts
@@ -1,12 +1,12 @@
 import { Request } from "express";
-import ContentTypesMapperModel from "../models/contentTypesMapper";
-import FieldMapperModel from "../models/FieldMapper";
-import ProjectModel from "../models/project";
-import { getLogMessage, isEmpty, safePromise } from "../utils";
+import ContentTypesMapperModel from "../models/contentTypesMapper.js";
+import FieldMapperModel from "../models/FieldMapper.js";
+import ProjectModel from "../models/project.js";
+import { getLogMessage, isEmpty, safePromise } from "../utils/index.js";
 import {
   BadRequestError,
   ExceptionFunction,
-} from "../utils/custom-errors.utils";
+} from "../utils/custom-errors.utils.js";
 import {
   CONTENT_TYPE_POPULATE_FIELDS,
   HTTP_TEXTS,
@@ -16,12 +16,12 @@ import {
   EXCLUDE_CONTENT_MAPPER,
   PROJECT_STATUS,
   STEPPER_STEPS,
-} from "../constants";
-import logger from "../utils/logger";
-import { config } from "../config";
-import https from "../utils/https.utils";
-import getAuthtoken from "../utils/auth.utils";
-import getProjectUtil from "../utils/get-project.utils";
+} from "../constants/index.js";
+import logger from "../utils/logger.js";
+import { config } from "../config/index.js";
+import https from "../utils/https.utils.js";
+import getAuthtoken from "../utils/auth.utils.js";
+import getProjectUtil from "../utils/get-project.utils.js";
 
 // Developer service to create dummy contentmapping data
 const putTestData = async (req: Request) => {
diff --git a/src/services/org.service.ts b/src/services/org.service.ts
index 0cc33a9c3..19f2e8e19 100644
--- a/src/services/org.service.ts
+++ b/src/services/org.service.ts
@@ -1,12 +1,12 @@
 import { Request } from "express";
-import { config } from "../config";
-import { safePromise, getLogMessage } from "../utils/index";
-import https from "../utils/https.utils";
-import { LoginServiceType } from "../models/types";
-import getAuthtoken from "../utils/auth.utils";
-import logger from "../utils/logger";
-import { HTTP_TEXTS, HTTP_CODES } from "../constants";
-import { ExceptionFunction } from "../utils/custom-errors.utils";
+import { config } from "../config/index.js";
+import { safePromise, getLogMessage } from "../utils/index.js";
+import https from "../utils/https.utils.js";
+import { LoginServiceType } from "../models/types.js";
+import getAuthtoken from "../utils/auth.utils.js";
+import logger from "../utils/logger.js";
+import { HTTP_TEXTS, HTTP_CODES } from "../constants/index.js";
+import { ExceptionFunction } from "../utils/custom-errors.utils.js";
 
 const getAllStacks = async (req: Request): Promise<LoginServiceType> => {
   const srcFun = "getAllStacks";
diff --git a/src/services/projects.service.ts b/src/services/projects.service.ts
index 317c76057..26f3a519d 100644
--- a/src/services/projects.service.ts
+++ b/src/services/projects.service.ts
@@ -1,10 +1,10 @@
 import { Request } from "express";
-import ProjectModel from "../models/project";
+import ProjectModel from "../models/project.js";
 import {
   BadRequestError,
   ExceptionFunction,
   NotFoundError,
-} from "../utils/custom-errors.utils";
+} from "../utils/custom-errors.utils.js";
 import {
   EXCLUDE_CONTENT_MAPPER,
   PROJECT_UNSELECTED_FIELDS,
@@ -14,14 +14,14 @@ import {
   POPULATE_FIELD_MAPPING,
   PROJECT_STATUS,
   STEPPER_STEPS,
-} from "../constants";
-import { config } from "../config";
-import { getLogMessage, isEmpty, safePromise } from "../utils";
-import getAuthtoken from "../utils/auth.utils";
-import https from "../utils/https.utils";
-import getProjectUtil from "../utils/get-project.utils";
-import logger from "../utils/logger";
-import { contentMapperService } from "./contentMapper.service";
+} from "../constants/index.js";
+import { config } from "../config/index.js";
+import { getLogMessage, isEmpty, safePromise } from "../utils/index.js";
+import getAuthtoken from "../utils/auth.utils.js";
+import https from "../utils/https.utils.js";
+import getProjectUtil from "../utils/get-project.utils.js";
+import logger from "../utils/logger.js";
+import { contentMapperService } from "./contentMapper.service.js";
 
 const getAllProjects = async (req: Request) => {
   const orgId = req?.params?.orgId;
@@ -306,6 +306,33 @@ const updateAffix = async (req: Request) => {
   };
 };
 
+const affixConfirmation = async (req: Request) => {
+  const { orgId, projectId } = req.params;
+  const { token_payload, affix_confirmation } = req.body;
+
+  const project = await getProjectUtil(
+    projectId,
+    {
+      _id: projectId,
+      org_id: orgId,
+      region: token_payload?.region,
+      owner: token_payload?.user_id,
+    },
+    EXCLUDE_CONTENT_MAPPER
+  );
+
+  project.legacy_cms.affix_confirmation = affix_confirmation;
+
+  await project.save();
+
+  return {
+    status: HTTP_CODES.OK,
+    data: {
+      message: HTTP_TEXTS.AFFIX_CONFIRMATION_UPDATED,
+    },
+  };
+};
+
 const updateFileFormat = async (req: Request) => {
   const { orgId, projectId } = req.params;
   const { token_payload, file_format } = req.body;
@@ -382,6 +409,33 @@ const updateFileFormat = async (req: Request) => {
   }
 };
 
+const fileformatConfirmation = async (req: Request) => {
+  const { orgId, projectId } = req.params;
+  const { token_payload, fileformat_confirmation } = req.body;
+
+  const project = await getProjectUtil(
+    projectId,
+    {
+      _id: projectId,
+      org_id: orgId,
+      region: token_payload?.region,
+      owner: token_payload?.user_id,
+    },
+    EXCLUDE_CONTENT_MAPPER
+  );
+
+  project.legacy_cms.file_format_confirmation = fileformat_confirmation;
+
+  await project.save();
+
+  return {
+    status: HTTP_CODES.OK,
+    data: {
+      message: HTTP_TEXTS.FILEFORMAT_CONFIRMATION_UPDATED,
+    },
+  };
+};
+
 const updateDestinationStack = async (req: Request) => {
   const { orgId, projectId } = req.params;
   const { token_payload, stack_api_key } = req.body;
@@ -584,7 +638,9 @@ export const projectService = {
   updateProject,
   updateLegacyCMS,
   updateAffix,
+  affixConfirmation,
   updateFileFormat,
+  fileformatConfirmation,
   updateDestinationStack,
   updateCurrentStep,
   deleteProject,
diff --git a/src/services/user.service.ts b/src/services/user.service.ts
index c547890f8..5d9df450b 100644
--- a/src/services/user.service.ts
+++ b/src/services/user.service.ts
@@ -1,27 +1,31 @@
 import { Request } from "express";
-import { config } from "../config";
-import https from "../utils/https.utils";
-import { AppTokenPayload, LoginServiceType } from "../models/types";
-import { HTTP_CODES, HTTP_TEXTS } from "../constants";
+import { config } from "../config/index.js";
+import https from "../utils/https.utils.js";
+import { AppTokenPayload, LoginServiceType } from "../models/types.js";
+import { HTTP_CODES, HTTP_TEXTS } from "../constants/index.js";
 import {
   BadRequestError,
   ExceptionFunction,
-} from "../utils/custom-errors.utils";
-import AuthenticationModel from "../models/authentication";
-import { safePromise, getLogMessage } from "../utils";
-import logger from "../utils/logger";
+} from "../utils/custom-errors.utils.js";
+import AuthenticationModel from "../models/authentication.js";
+import { safePromise, getLogMessage } from "../utils/index.js";
+import logger from "../utils/logger.js";
 
 const getUserProfile = async (req: Request): Promise<LoginServiceType> => {
   const srcFun = "getUserProfile";
   const appTokenPayload: AppTokenPayload = req?.body?.token_payload;
 
   try {
-    const user = await AuthenticationModel.findOne({
-      user_id: appTokenPayload?.user_id,
-      region: appTokenPayload?.region,
-    }).lean();
+    AuthenticationModel.read();
+    const userIndex = AuthenticationModel.chain
+      .get("users")
+      .findIndex({
+        user_id: appTokenPayload?.user_id,
+        region: appTokenPayload?.region,
+      })
+      .value();
 
-    if (!user?.authtoken) throw new BadRequestError(HTTP_TEXTS.NO_CS_USER);
+    if (userIndex < 0) throw new BadRequestError(HTTP_TEXTS.NO_CS_USER);
 
     const [err, res] = await safePromise(
       https({
@@ -31,7 +35,7 @@ const getUserProfile = async (req: Request): Promise<LoginServiceType> => {
         ]!}/user?include_orgs_roles=true`,
         headers: {
           "Content-Type": "application/json",
-          authtoken: user?.authtoken,
+          authtoken: AuthenticationModel.data.users[userIndex]?.authtoken,
         },
       })
     );
diff --git a/src/utils/auth.utils.ts b/src/utils/auth.utils.ts
index 053a77593..6a5c9cebf 100644
--- a/src/utils/auth.utils.ts
+++ b/src/utils/auth.utils.ts
@@ -1,13 +1,19 @@
-import AuthenticationModel from "../models/authentication";
-import { UnauthorizedError } from "../utils/custom-errors.utils";
+import AuthenticationModel from "../models/authentication.js";
+import { UnauthorizedError } from "../utils/custom-errors.utils.js";
 
 export default async (region: string, userId: string) => {
-  const res = await AuthenticationModel.findOne({
-    region: region,
-    user_id: userId,
-  }).lean();
+  AuthenticationModel.read();
+  const userIndex = AuthenticationModel.chain
+    .get("users")
+    .findIndex({
+      region: region,
+      user_id: userId,
+    })
+    .value();
 
-  if (!res?.authtoken) throw new UnauthorizedError();
+  const authToken = AuthenticationModel.data.users[userIndex]?.authtoken;
 
-  return res?.authtoken;
+  if (userIndex < 0 || !authToken) throw new UnauthorizedError();
+
+  return authToken;
 };
diff --git a/src/utils/custom-errors.utils.ts b/src/utils/custom-errors.utils.ts
index b6ff34a65..4b33d15f3 100644
--- a/src/utils/custom-errors.utils.ts
+++ b/src/utils/custom-errors.utils.ts
@@ -1,4 +1,4 @@
-import { HTTP_CODES, HTTP_TEXTS } from "../constants";
+import { HTTP_CODES, HTTP_TEXTS } from "../constants/index.js";
 
 export class AppError extends Error {
   constructor(public statusCode: number, message: string) {
diff --git a/src/utils/get-project.utils.ts b/src/utils/get-project.utils.ts
index add5a064e..4a9142efd 100644
--- a/src/utils/get-project.utils.ts
+++ b/src/utils/get-project.utils.ts
@@ -1,12 +1,12 @@
-import ProjectModel from "../models/project";
+import ProjectModel from "../models/project.js";
 import {
   BadRequestError,
   ExceptionFunction,
-} from "../utils/custom-errors.utils";
-import { HTTP_CODES, HTTP_TEXTS } from "../constants";
-import { MigrationQueryType } from "../models/types";
-import { getLogMessage, isValidObjectId } from "../utils";
-import logger from "./logger";
+} from "../utils/custom-errors.utils.js";
+import { HTTP_CODES, HTTP_TEXTS } from "../constants/index.js";
+import { MigrationQueryType } from "../models/types.js";
+import { getLogMessage, isValidObjectId } from "../utils/index.js";
+import logger from "./logger.js";
 
 export default async (
   projectId: string,
diff --git a/src/utils/https.utils.ts b/src/utils/https.utils.ts
index c2e825add..0ab6a892e 100644
--- a/src/utils/https.utils.ts
+++ b/src/utils/https.utils.ts
@@ -1,5 +1,8 @@
 import axios from "axios";
-import { AXIOS_TIMEOUT, METHODS_TO_INCLUDE_DATA_IN_AXIOS } from "../constants";
+import {
+  AXIOS_TIMEOUT,
+  METHODS_TO_INCLUDE_DATA_IN_AXIOS,
+} from "../constants/index.js";
 
 type httpType = {
   url: string;
diff --git a/src/utils/jwt.utils.ts b/src/utils/jwt.utils.ts
index 9d1ce88c0..d6f59aa7b 100644
--- a/src/utils/jwt.utils.ts
+++ b/src/utils/jwt.utils.ts
@@ -1,7 +1,7 @@
 /// src/utils/jwt.utils.ts
 import jwt from "jsonwebtoken";
-import { AppTokenPayload } from "../models/types";
-import { config } from "../config";
+import { AppTokenPayload } from "../models/types.js";
+import { config } from "../config/index.js";
 
 // @typescript-eslint/no-explicit-any
 export const generateToken = (payload: AppTokenPayload): string => {
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
index 36eafe798..cbde4f7b0 100644
--- a/src/utils/logger.ts
+++ b/src/utils/logger.ts
@@ -5,13 +5,9 @@ const logger = createLogger({
   level: "info",
   format: format.combine(format.timestamp(), format.json()),
   transports: [
-    // - Write all logs with importance level of `error` or less to `error.log`
-    new transports.File({ filename: "error.log", level: "error" }),
     // - Write all logs with importance level of `info` or less to `combined.log`
     new transports.File({ filename: "combine.log" }),
-    new transports.Console({
-      format: format.combine(format.timestamp(), format.prettyPrint()),
-    }),
+    new transports.Console({}),
   ],
 });
 
diff --git a/src/validators/affix-confirmation.validator.ts b/src/validators/affix-confirmation.validator.ts
new file mode 100644
index 000000000..5bbea21a7
--- /dev/null
+++ b/src/validators/affix-confirmation.validator.ts
@@ -0,0 +1,15 @@
+import { checkSchema } from "express-validator";
+import { VALIDATION_ERRORS } from "../constants/index.js";
+
+export default checkSchema({
+  affix_confirmation: {
+    in: "body",
+    isBoolean: {
+      errorMessage: VALIDATION_ERRORS.BOOLEAN_REQUIRED.replace(
+        "$",
+        "affix_confirmation"
+      ),
+      bail: true,
+    },
+  },
+});
diff --git a/src/validators/affix.validator.ts b/src/validators/affix.validator.ts
index 0174a348a..62cf4af82 100644
--- a/src/validators/affix.validator.ts
+++ b/src/validators/affix.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS, AFFIX_REGEX } from "../constants";
+import { VALIDATION_ERRORS, AFFIX_REGEX } from "../constants/index.js";
 
 export default checkSchema({
   affix: {
diff --git a/src/validators/auth.validator.ts b/src/validators/auth.validator.ts
index 3446b3e8b..3ddc61d5e 100644
--- a/src/validators/auth.validator.ts
+++ b/src/validators/auth.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS, CS_REGIONS } from "../constants";
+import { VALIDATION_ERRORS, CS_REGIONS } from "../constants/index.js";
 
 export default checkSchema({
   email: {
diff --git a/src/validators/cms.validator.ts b/src/validators/cms.validator.ts
index 77c339fcd..3b04f0625 100644
--- a/src/validators/cms.validator.ts
+++ b/src/validators/cms.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS } from "../constants";
+import { VALIDATION_ERRORS } from "../constants/index.js";
 
 export default checkSchema({
   legacy_cms: {
diff --git a/src/validators/destination-stack.validator.ts b/src/validators/destination-stack.validator.ts
index d9cb29f06..3c48f193c 100644
--- a/src/validators/destination-stack.validator.ts
+++ b/src/validators/destination-stack.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS } from "../constants";
+import { VALIDATION_ERRORS } from "../constants/index.js";
 
 export default checkSchema({
   stack_api_key: {
diff --git a/src/validators/file-format.validator.ts b/src/validators/file-format.validator.ts
index 9cf036543..22aa06b1d 100644
--- a/src/validators/file-format.validator.ts
+++ b/src/validators/file-format.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS } from "../constants";
+import { VALIDATION_ERRORS } from "../constants/index.js";
 
 export default checkSchema({
   file_format: {
diff --git a/src/validators/fileformat-confirmation.validator.ts b/src/validators/fileformat-confirmation.validator.ts
new file mode 100644
index 000000000..199260966
--- /dev/null
+++ b/src/validators/fileformat-confirmation.validator.ts
@@ -0,0 +1,15 @@
+import { checkSchema } from "express-validator";
+import { VALIDATION_ERRORS } from "../constants/index.js";
+
+export default checkSchema({
+  fileformat_confirmation: {
+    in: "body",
+    isBoolean: {
+      errorMessage: VALIDATION_ERRORS.BOOLEAN_REQUIRED.replace(
+        "$",
+        "fileformat_confirmation"
+      ),
+      bail: true,
+    },
+  },
+});
diff --git a/src/validators/index.ts b/src/validators/index.ts
index 1418e5dd2..269e5893e 100644
--- a/src/validators/index.ts
+++ b/src/validators/index.ts
@@ -1,12 +1,14 @@
 import { Request, NextFunction, Response } from "express";
-import { ValidationError } from "../utils/custom-errors.utils";
-import { asyncRouter } from "../utils/async-router.utils";
-import authValidator from "./auth.validator";
-import projectValidator from "./project.validator";
-import cmsValidator from "./cms.validator";
-import fileFormatValidator from "./file-format.validator";
-import destinationStackValidator from "./destination-stack.validator";
-import affixValidator from "./affix.validator";
+import { ValidationError } from "../utils/custom-errors.utils.js";
+import { asyncRouter } from "../utils/async-router.utils.js";
+import authValidator from "./auth.validator.js";
+import projectValidator from "./project.validator.js";
+import cmsValidator from "./cms.validator.js";
+import fileFormatValidator from "./file-format.validator.js";
+import destinationStackValidator from "./destination-stack.validator.js";
+import affixValidator from "./affix.validator.js";
+import affixConfirmationValidator from "./affix-confirmation.validator.js";
+import fileformatConfirmationValidator from "./fileformat-confirmation.validator.js";
 
 export default (route: string = "") =>
   asyncRouter(async (req: Request, res: Response, next: NextFunction) => {
@@ -17,6 +19,8 @@ export default (route: string = "") =>
       file_format: fileFormatValidator,
       destination_stack: destinationStackValidator,
       affix: affixValidator,
+      affix_confirmation_validator: affixConfirmationValidator,
+      fileformat_confirmation_validator: fileformatConfirmationValidator,
     };
 
     const validator = appValidators[route as keyof typeof appValidators];
diff --git a/src/validators/project.validator.ts b/src/validators/project.validator.ts
index b87f7165f..d3e97973f 100644
--- a/src/validators/project.validator.ts
+++ b/src/validators/project.validator.ts
@@ -1,5 +1,5 @@
 import { checkSchema } from "express-validator";
-import { VALIDATION_ERRORS } from "../constants";
+import { VALIDATION_ERRORS } from "../constants/index.js";
 
 export default checkSchema({
   name: {
diff --git a/tsconfig.json b/tsconfig.json
index b2b4b602e..e486dfcbb 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,14 +1,14 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "CommonJS",
+    "module": "NodeNext",
     "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,
     "esModuleInterop": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "node",
+    "moduleResolution": "NodeNext",
     "allowJs": true,
     "baseUrl": ".",
     "paths": {