- backend-net (internal: true): db ↔ backend ↔ frontend reverse proxy
- frontend-net: frontend only; single host port binding (80 prod / 5173 dev)
- Remove ports: from db (5432) and backend (8000) — unreachable from host
- Security auditor: hard rule to never add host ports to db or backend
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
curo1305