Mysql2::Error: Can't connect to MySQL server on '127.0.0.1' on heroku push

When i do git push heroku master ,it fails at rake assets precompile and i get an error Mysql2::Error: Can't connect to MySQL server on '127.0.0.1' heroku

What i already know Since i am using Rails 4,Definitely config.assets.initialize_on_precompile = false is out of the picture because is no longer required.

heroku labs:enable user-env-compile this feature is no longer supported by Heroku.

After doing research online, I learned that the solution might be here heroku build pack But i don't understand how to run those commands. I keep getting bash: bin/compile: No such file or directory

How do i resolve this issue? I am using Rails 4.2.5 ,Ruby 2.3.0 and the Db is Mysql locally.Thank you in advance.