Fullstack Audiophile E-Commerce Website

This is the biggest and most challenging project I've completed here on frontend mentor and it was a pretty fun one. It's my second attempt at a fullstack project and it was the first time I used a service like supabase to handle the authentication and database hosting. For the rest of the backend (api routes) I chose to build my own express server so I could practice doing that more. The code isn't the cleanest right now because I haven't really done much refactoring at this point, but I'm going to do it (and testing) in the following days so any suggestions on that or any other areas of the code like the logic, styling, best practices or design patterns are very welcome.