Add frontend service with auth, MFA, and content management

- Node.js/Express backend with TypeScript
- SQLite database for users, sessions, and content metadata
- Authentication with TOTP and WebAuthn MFA support
- Admin user auto-created on first startup
- User content gallery with view/delete functionality
- RunPod API proxy (keeps API keys server-side)
- Docker setup with CI/CD for Gitea registry

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/.env.example

@@ -0,0 +1,31 @@
+# Server Configuration
+NODE_ENV=production
+PORT=3000
+DATA_DIR=/app/data
+
+# Session Configuration
+SESSION_SECRET=change-this-to-a-secure-random-string-at-least-32-chars
+
+# Initial Admin User (only used on first startup if no users exist)
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=change-this-secure-password
+ADMIN_EMAIL=admin@example.com
+
+# RunPod API Configuration
+RUNPOD_API_KEY=your-runpod-api-key
+RUNPOD_ENDPOINT_ID=your-endpoint-id
+
+# WebAuthn Configuration
+WEBAUTHN_RP_ID=localhost
+WEBAUTHN_RP_NAME=ComfyUI Video Generator
+WEBAUTHN_ORIGIN=http://localhost:3000
+
+# Security
+ENCRYPTION_KEY=0000000000000000000000000000000000000000000000000000000000000000
+TRUST_PROXY=true
+
+# Rate Limiting
+RATE_LIMIT_WINDOW_MS=60000
+RATE_LIMIT_MAX_REQUESTS=100
+LOGIN_RATE_LIMIT_MAX=5
+LOGIN_RATE_LIMIT_WINDOW_MS=900000