Update README

Author: hrishimittal

README.md

@@ -3,3 +3,17 @@
 A chat app built with React.js and ActionCable in Ruby on Rails 5.1, built as part of a tutorial on [Learnetto](https://learnetto.com).
 
 [See a live demo here](https://reactrooms.herokuapp.com)
+
+Run the following commands on the commandline to get it working:
+
+```
+git clone https://github.com/learnetto/reactchat.git
+
+cd reactchat
+
+rails db:migrate
+
+bundle && yarn
+
+foreman start -f Procfile.dev
+```