Use when encountering dev server startup failures, HMR issues, proxy errors, CORS blocks, or module not found errors during development. Prevents misconfiguring server.hmr behind reverse proxies and forgetting appType: 'custom' in middleware mode. Covers HMR full-reload debugging, proxy configuratio
Use when encountering dev server startup failures, HMR issues, proxy errors, CORS blocks, or module not found errors during development. Prevents misconfiguring server.hmr behind reverse proxies and forgetting appType: 'custom' in middleware mode. Covers HMR full-reload debugging, proxy configuration, CORS setup, HTTPS certificates, server.fs.strict violations, port conflicts, WebSocket failures,