d80y6/obss ? reverse-engineered prompt

Build me this project into a working full stack app from the existing codebase and OpenAPI file.

I want the backend, frontend, and supporting infrastructure wired together so I can run it locally with Docker Compose and see the app working end to end. Use the API contract in openapi.json as the source of truth, and make sure the frontend matches whatever the backend exposes. If anything is unclear, check the repo and the current docs online before guessing.

Please also make the tests pass, add any missing validation, and clean up the solution so it builds without errors. If there are gaps in the implementation, fill them in in a sensible way instead of leaving stubs. Keep the setup simple, and make sure I can understand how to start it and verify it works.