title: Renaming index.js to index.jsx in react app
body: <p>I'm new to react and i started an app using create react app.When i try to rename index.js to index.jsx, I'm getting an error saying 
  "Module build failed: Error: ENOENT: no such file or directory, open '/home/qbuser/Desktop/onChat-final/new/chat/client/src/index.js'".
  What should be done? Where did I go wrong?</p>