tlee2210/backend-app ? reverse-engineered prompt

Build me a simple backend app that can act like the start of a real service. I want a clean, working project that I can open and run, with a basic API, a few example endpoints, and a sensible structure so it’s easy to grow later.

Please set it up so I can test it locally without a lot of fuss, and include a small sample of real data handling, like creating, reading, updating, and deleting something simple. If you need to check current docs online to make sure the setup is modern, go ahead.

Keep the code straightforward and easy to understand, and make sure the project is organized well enough that I could add more features later like authentication, database support, and more endpoints. If anything is unclear, make a practical choice and keep moving.