Version 2.0

[SpyrosRoum]

Whole project was re-written in axum; the api remains the same, the executable doesn't take command line arguments anymore but it uses env variables entirely

ToDo

• Update README
• Introduce tests
  This will need a change in the structure of the project to accommodate easy testing
• Swap log for tracing
  • Improve the number and the quality of the logs
  • Use TraceLayer from `tower-http
• Settle on a way to configure the app. With Axum rewrite #9 I made all of configuration to happen with env variables exclusively but maybe a file would be good? I don't think I will bring back the old cli configuration
  Update: env variables are enough.