- Change the API default listen port from 3000 to 3100 and include the Docker frontend origin in default CORS.
- Point Vite's default API proxy, Docker API container port, and Nginx upstream to 3100.
- Keep Docker host ports on 4002 for web, 3002 for API, and 5433 for PostgreSQL.
- Update environment examples and documentation to remove stale localhost:3000 guidance.