How to add overrides to a rails app?

Hi folks

I want to use an existing rails app and adjust some things as well as build new features on top of it. How would I do this and still be able to just pull updates from this apps repository as soon as they are available?

Thank you!

Typically you'll just want to fork the original repo and merge updates from it. That's what we do for Jumpstart Pro when users want to pull in updates.