abdurrahmancodes1/storage-backend ? reverse-engineered prompt

Build me a simple backend for a storage app in JavaScript.

I want an API that can handle saving and managing stored items, with clear separation for controllers, routes, services, models, validators, and middleware. Please set it up so it runs cleanly with Docker too, and make sure the app starts from a main server file. If anything is unclear, use sensible defaults and keep the code organized so it is easy to extend later.

Please include basic request validation, error handling, and any utility code needed to keep the project tidy. If you need to check current best practices or docs online while building it, feel free to do that.