learnlib/alex ? reverse-engineered prompt

Build me a web app called ALEX that helps me test web apps and JSON APIs by learning how they behave automatically.

I want users to be able to define test inputs with either browser actions or HTTP requests, then run the learning process and get back a simple model of the app’s behavior, ideally something like a state machine they can inspect. Make it feel like a real product for researchers or QA folks, with a clean frontend, a backend that handles the learning work, and a way to run it locally with Docker.

Please include the basic pages for setting up a project, starting a run, and viewing the results and logs. If you need to check current setup details or best practices, look up the docs online and follow what makes sense for this kind of app.