Multi-Container Stacks with Docker Compose
Define multi-service applications using docker-compose.yml, configure container bridges, volumes, environment variables, and health checks.
Docker Compose Architecture
### Docker Compose Networks & Volumes
Docker Compose manages multi-container application lifecycles.
- **Networks**: Automatically creates isolated DNS bridge networks allowing containers to communicate using service names (`http://backend:3000`).
- **Volumes**: Mounts persistent host storage so database records survive container restarts.
