shiumahmedsowad-ui/assignment-15 ? reverse-engineered prompt

Build me a simple notes app backend where users can sign up, log in, and manage their own notes.

I want the server to handle basic authentication, protect private routes, and let each user create, read, update, and delete their notes. Please organize it so the auth logic, note logic, routes, and middleware are separated cleanly, and make it easy to run and test locally. If anything is unclear, use sensible defaults and keep the code straightforward.

Please also make sure the app connects through a config file, starts from the main entry file, and returns clear JSON responses for success and errors. If you need current library details, look them up online and follow the latest docs.