DKKaraoke/dam_k_server_hbbo_001 ? reverse-engineered prompt

Build me a small Python proof of concept that has a lightweight server and a simple command line tool to interact with it. The main goal is to recreate and test a suspected security issue in a safe local environment, so it should be easy to start the server, send example requests from the CLI, and clearly see what is happening in the responses and logs.

Please make it runnable both locally and in Docker, with sensible defaults so I can get it going quickly without a lot of setup. I also want basic error handling, a couple of example commands, and short usage notes since there does not seem to be much project documentation yet. Keep it focused on research and demonstration, not production hardening.

If you need to fill in missing details, choose simple conventions that make the proof of concept easy to understand and repeat. You can look up current docs online if needed.