feat: steps to make it a services-flake module as well for local testing?

Hi, looks like a good starting base repo for authentic stuff. Would it be hard to make this authentic service (maybe with a file(sqlite)/mem DB backend if possible) importable in [services-flake](https://github.com/juspay/services-flake)? with process-compose? Maybe its easier to use your package + maintain a services module in https://github.com/juspay/services-flake Do you might have some suggestion which might be important for an implementation.