AashishNandakumar/MiraPay-Backend ? reverse-engineered prompt

Build me the backend for MiraPay, a facial recognition service for fast retail checkout.

I want a working Django app that lets a user submit their details, upload or capture a face image, and then later identify that person from a live image or uploaded photo. It should store user profiles and facial data safely, expose simple API endpoints for registration, login or match, and basic user lookup, and be ready to run locally with Docker.

Please keep the project easy to start, with the database and server wired up so I can run it with one command. If there is any missing piece for face matching or image handling, please implement a sensible version and use current docs online if you need to. Also include a simple way to generate an invoice or transaction record tied to a recognized user, since this is meant for a checkout flow.

Make it clean, organized, and usable as the backend for the frontend pages mentioned in the README.