Update readme

Author: shsenior

README.md

@@ -1,3 +1,6 @@
+**_Important Notice:_**
+Due to a [change in the AWS Lambda execution environment](https://aws.amazon.com/blogs/compute/upcoming-updates-to-the-aws-lambda-execution-environment/), Serverless Image Handler v3 deployments are functionally broken. To address the issue we have released [minor version update v3.1.1](https://solutions-reference.s3.amazonaws.com/serverless-image-handler/v3.1.1/serverless-image-handler.template). We recommend all users of v3 to run cloudformation stack update with v3.1.1. Additionally, we suggest you to look at v4 of the solution and migrate to v4 if it addresses all of your use cases. 
+
 # AWS Serverless Image Handler Lambda wrapper for SharpJS
 A solution to dynamically handle images on the fly, utilizing Sharp (https://sharp.pixelplumbing.com/en/stable/).
 Published version, additional details and documentation are available here: https://aws.amazon.com/solutions/serverless-image-handler/
@@ -35,7 +38,7 @@ cd serverless-image-handler/deployment
 
 * Now build the distributable
 ```bash
-sudo ./build-s3-dist.sh $DIST_OUTPUT_BUCKET $TEMPLATE_OUTPUT_BUCKET $VERSION
+sudo ./build-s3-dist.sh $DIST_OUTPUT_BUCKET $VERSION
 ```
 
 * Deploy the distributable to an Amazon S3 bucket in your account. Note: you must have the AWS Command Line Interface installed.