Best option for a config file?

New to unity. I’m working on a WebGL project and there are various URLs that change depending on if it’s a developer build or release build. I have to provide some sort of config file that lets the deployers of the project change that file without needing to change the code. Is there a standard config file for this that Unity WebGL projects generally use? Or can it be literally anything and I just read it from code at startup?

it could be anything, I would use a scriptableObject that you can save and load as JSON