robin-concira/backend ? reverse-engineered prompt

Build me a simple backend API with Node.js and Express that I can run locally with one command.

I want a welcome route at /, a health check at /health, and a basic users API with GET /api/users to list users, GET /api/users/:id to fetch one user, POST /api/users to create a user, PUT /api/users/:id to update a user, and DELETE /api/users/:id to remove a user. Keep the user data dummy and easy to work with, even if it is just in memory for now.

Please make it easy to start with npm install and npm start, and include whatever basic setup is needed so the project runs cleanly. If it helps, add a simple Docker setup too. Keep the responses clear and consistent, and make sure the API returns sensible JSON and basic success or error messages. If you need to check current docs online for anything, go ahead and do that.