Explain Docker container lifecycle and state management.

Docker container lifecycle states: 1) Created: Container created but not started (docker create), 2) Running: Container is executing (docker start, docker run), 3) Paused: Container processes are paused (docker pause), 4) Stopped: Container has exited (docker stop), 5) Killed: Container forcefully terminated (docker kill), 6) Removed: Container deleted from system (docker rm). State transitions: docker create -> docker start -> Running, docker pause -> Paused -> docker unpause -> Running, docker stop -> Stopped -> docker start -> Running, docker kill -> Stopped, docker rm -> Removed. Management commands: docker ps (running containers), docker ps -a (all containers), docker logs (container output), docker inspect (detailed info), docker stats (resource usage). Best practices: Use health checks for automatic restart, Implement graceful shutdown handling, Monitor container states, Clean up stopped containers regularly with docker container prune.