dianping/cat ? reverse-engineered prompt

Build me a real time application monitoring and alerting platform like CAT, with a web console where I can see charts, reports, and recent events, plus a backend that collects data from services and turns it into useful stats and alerts.

I want it to support the common monitoring types, like transactions, events, heartbeats, and metrics, and make it easy for apps to send data in and get feedback fast. It should feel like a system teams can use to spot problems quickly, figure out where something broke, and keep an eye on service health without slowing the app down.

Please set up the main pieces for the server, alerting, and admin UI, and include a simple way to run it locally or with Docker if that makes sense. If you need current setup details, look up the latest docs online and follow the project style.