How to choose the right backend for a react or vue project?

Question

Web development

I'm learning react and want to try my hand at writing a small store. There was a question - on what to do backend? I want to apologize for the fact that I "swim" in this topic, I will be grateful for the help. I'm leaning towards slim.php. But here the question arises - how to do authorization? For example, authorization is built into Laravel by default, but do I need such a powerful engine? It seems that authorization can be done in react, but I still don’t understand how this authorization will interact with the php backend. Or maybe for the backend, I'd better sit down to learn an express-type framework and give up PHP? Once again I apologize for the confusion of thoughts, I hope they will help me figure it out.

Answer 1

Front and back are not connected in any way.
The front is js only.
Back - you can do it in any language.