docs: README update

Author: niallthomson

README.md

@@ -4,7 +4,9 @@
   <div align="center">
 
 [![Stars](https://img.shields.io/github/stars/aws-containers/retail-store-sample-app)](Stars)
-[![License](https://img.shields.io/github/license/aws-containers/retail-store-sample-app)](LICENSE)
+![GitHub License](https://img.shields.io/github/license/aws-containers/retail-store-sample-app?color=green)
+![Dynamic JSON Badge](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fraw.githubusercontent.com%2Faws-containers%2Fretail-store-sample-app%2Frefs%2Fheads%2Fmain%2F.release-please-manifest.json&query=%24%5B%22.%22%5D&label=release)
+![GitHub Release Date](https://img.shields.io/github/release-date/aws-containers/retail-store-sample-app)
 
   </div>