add doc for git pages deploy

Author: 狼叔

.gitignore

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+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# Commenting this out is preferred by some people, see
+# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git-
+node_modules
+
+# Users Environment Variables
+.lock-wscript
+.vscode/
+preview/
+package-lock.json

generate.sh

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+cp -rf media preview/
+./node_modules/.bin/i5ting_toc README.md 

gulpfile.js

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+var gulp = require('gulp');
+var gp_deploy = require('gulp-gh-pages');
+var open = require("gulp-open");
+var rename = require("gulp-rename");
+require('shelljs/global');
+
+var options = {}
+gulp.task('deploy', function () {
+    return gulp.src('./preview/**/*')
+        .pipe(gp_deploy(options));
+});
+
+gulp.task('rename',function () {
+	if (exec('cp ./preview/README.html ./preview/index.html').code !== 0) {
+	  echo('Error: rename exec failed');
+	  exit(1);
+	}	
+});
+
+gulp.task('generate',function () {
+	// Run external tool synchronously
+	if (exec('sh ./generate.sh').code !== 0) {
+	  echo('Error: generate.sh exec failed');
+	  exit(1);
+	}	
+});
+
+gulp.task('show',['generate'] ,function () {
+    console.log('show');
+});
+
+gulp.task('default',['generate', 'rename', 'deploy'] ,function () {
+    console.log('default');
+});

package.json

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+{
+  "name": "How-to-learn-node-correctly",
+  "version": "1.0.0",
+  "description": "node.js tutorial ===================",
+  "main": "",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/i5ting/node-debug-tutorial.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/i5ting/node-debug-tutorial/issues"
+  },
+  "homepage": "https://github.com/i5ting/node-debug-tutorial",
+  "dependencies": {
+    "gulp": "^3.8.10",
+    "gulp-gh-pages": "^0.4.0",
+    "gulp-open": "^0.3.1",
+    "gulp-rename": "^1.2.0",
+    "i5ting_toc": "^1.1.5",
+    "shelljs": "^0.3.0"
+  }
+}