Added task for deploying to heroku
Testing with heroku
Using custom domain
Corrected typo in callback url
Switching to Google2Client
Retrieving user profile from Google2Client
Trying without setting callback
Adding null check when retrieving user profile
Working OAuth with Google
Handles FileNotFoundException in Heroku.

We don't need the .env file in heroku, only during development.
Opening .env file in try-catch block
Edited Readme
Fixed Procfile
Fixed project name in Procfile
Added a few instructions to Readme