feat: add GameGroup2 project with frontend and backend

- Add .gitignore for Node.js and PocketBase projects
- Add frontend (Vue 3 + Vite + TypeScript)
- Add backend (PocketBase)
- Add deployment scripts and Docker compose configs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docker-compose.backend.yml

@@ -0,0 +1,24 @@
+services:
+  pocketbase:
+    image: ghcr.io/muchobien/pocketbase:0.22.4
+    container_name: gamegroup-pb
+    ports:
+      - "8711:8090"
+    volumes:
+      - ./backend/pb_data:/pb_data
+      - ./backend/pb_migrations:/pb_migrations
+    environment:
+      - GO_ENV=production
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8090/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+    networks:
+      - gamegroup-net
+
+networks:
+  gamegroup-net:
+    driver: bridge