Update README.md

added overview section

Author: leonh

README.md

@@ -3,6 +3,9 @@ A simple demo of Redis Streams backed Chat app using Websockets, Python Asyncio
 
 Requires Python version >= 3.6 and Redis
 
+# Overview
+This project has been created to help understand some realted concepts. Python standard library asyncio, websockets (which are often cited as a classic use case for async python code), also Redis Streams. It is very much inteded to be an intentionally simple starting point rather than a usable product as is.
+
 # Installation
 
 ```shell