feat: integrate all 10 skills into homelab-topology

- Added api-security-hardening (helmet, rate limits)
- Added nodejs-backend-patterns (error handling)
- Added observability-monitoring (pino logging)
- Added websocket-engineer (socket.io real-time updates)
- Added docker (Multi-stage build, compose)
- Added vitest (testing configuration and store tests)
- Added data-visualizer (MetricsBar and HostChart)
- Added infrastructure-monitoring/proxmox-admin/network-engineer types
- Fixed UI accessibility and styling
- Cleaned up node_modules tracking

docker-compose.yml

@@ -0,0 +1,48 @@
+version: '3.8'
+
+services:
+  # Frontend dev server (Vite HMR)
+  frontend:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      target: builder
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./src:/app/src
+      - ./index.html:/app/index.html
+      - /app/node_modules
+    command: npm run dev -- --host 0.0.0.0
+    environment:
+      - VITE_API_URL=http://backend:3001
+    depends_on:
+      backend:
+        condition: service_healthy
+
+  # Backend API + WebSocket server
+  backend:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      target: builder
+    ports:
+      - "3001:3001"
+    volumes:
+      - ./server:/app/server
+      - /app/node_modules
+    command: npx tsx --watch server/index.ts
+    environment:
+      - NODE_ENV=development
+      - CORS_ORIGIN=http://localhost:3000
+      - LOG_LEVEL=debug
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3001/api/health"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+
+networks:
+  default:
+    name: homelab-topology