Ln 783 Container Launcher

Spins up Docker containers and waits for them to actually be healthy, not just running. Parses your docker-compose.yml, builds images, launches everything in the right order, then verifies health using native Docker healthchecks when available or falls back to HTTP probes with exponential backoff. The Monitor integration for streaming container logs is a nice touch for catching readiness signals without polling. It's opinionated about timeouts (120s max) and retry strategies, which is good because most people get this wrong. Best for dev environment setup where you need confidence things actually started. Hands you access URLs and cleanup commands when done.