Add pre-push hook example

[akanshak984]

Summary

• Added an example of pre-push hook.
• The example hook executes the command bundle exec rake - which runs both the linter and the tests before push.
• Updated CONTRIBUTING.md with steps for set-up and how to disable and skip the hook.

Reference comment: #2571 (comment)

Close #2571

[stefannibrasil]

Is this ready for review or is still a draft?

[akanshak984]

Is this ready for review or is still a draft?

It is in draft - As, I have only tested it on Linux. Will update after testing in windows and MacOS

[akanshak984]

Is this ready for review or is still a draft?

It is in draft - As, I have only tested it on Linux. Will update after testing in windows and MacOS

Tested on Windows and MacOS - It is working fine (Had to add shebang #!/bin/sh)

[stefannibrasil]

HI @akanshak984 thank you for working on this! This is really cool 😎

Could you create a folder called custom-hooks and place the example file there? It keeps the repository organized.

Also, could you edit the PR to say "Closes issue issue_number?" That way, the issues is automatically closed when this PR is merged. Thank you!

[akanshak984]

Could you create a folder called custom-hooks and place the example file there? It keeps the repository organized.

Sure, Done!

edit the PR to say "Closes issue issue_number?"

Done!

[stefannibrasil]

This is awesome. Thank you @akanshak984 🎉