populate the readme

README.md

@@ -1,2 +1,40 @@
 # chat-app
 
+Table of Contents
+
+- [chat-app](#chat-app)
+  - [Server](#server)
+  - [Client](#client)
+  - [Thanks to](#thanks-to)
+
+This is a simple chat app that use socket for connection, and it's clients side can use `netcat` to connect or use the provided client side script to open a GUI client using tkinter.
+
+## Server
+
+You can run the server side script inside the server subdirectory by using:
+
+`__main__.py HOST PORT`
+
+or
+
+`__main__.py -h`
+
+to see the full help dialog
+
+## Client
+
+You can run the client side script inside the client subdirectory by using:
+
+`__main__.py HOST PORT`
+
+or
+
+`__main__.py -h`
+
+to see the full help dialog
+
+## Thanks to
+Thanks to these two article as my inspiration
+
+ - https://www.geeksforgeeks.org/simple-chat-room-using-python
+ - https://medium.com/swlh/lets-write-a-chat-app-in-python-f6783a9ac170