- Add Dockerfile, docker-compose.yml, .dockerignore (Issue #11) - Add nginx config with CSP, HSTS, X-Frame-Options, X-Content-Type-Options headers (Issue #14) - Hide server version via server_tokens off, strip x-response-time-ms (Issues #21, #22) - Replace sys.path.insert with proper src.* imports + importlib fallback (Issue #7) - Add config.json.example template (Issue #5)