lasopablo/HTTP-load-testing ? reverse-engineered prompt

Build me a simple HTTP load testing app where I can enter a target URL, choose how hard to hit it, and then watch the results in real time.

I want the backend to run the load test, send requests at a fixed rate with a qps setting, and return useful stats like latency, errors, and success rate. I also want a clean web dashboard on the frontend that shows the test settings, starts and stops tests, and draws live charts for performance while the test is running. Make it look nice and easy to use, with a modern simple style.

Please make it work well in Docker so I can start the whole thing with compose, and also keep it runnable locally for development. If anything is unclear, use sensible defaults and look up current docs online if you need to.