Veiocafetao/raven-skins-backend ? reverse-engineered prompt

Build me the backend for a skins app called Raven Skins.

I want a simple Node server that can handle the basic API for a site or app that stores and serves skin data. Make it easy to run locally, keep the code clean, and set it up so I can add more routes later without it becoming messy. If you need to, look up the current docs online and use the best current approach for a small JavaScript backend.

Please include a working server file, sensible folder structure if needed, and a few example endpoints for things like getting a list of skins, getting one skin by id, and creating or updating skin data. Add any basic error handling and startup logging so I can tell it is running. If there is anything missing from the current project, fill in the minimum needed so it works end to end.