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>

backend/docker-compose.yml

@@ -2,10 +2,11 @@ version: '3.8'
 
 services:
   pocketbase:
-    image: ghcr.io/muchobien/pocketbase:v0.22.4
+    image: ghcr.io/muchobien/pocketbase:0.22.4
     container_name: gamegroup-pb
+    user: "${PB_UID:-1000}:${PB_GID:-1000}"
     ports:
-      - "${PB_PORT:-8090}:8090"
+      - "${PB_PORT:-8711}:8090"
     volumes:
       - ./pb_data:/pb_data
       - ./pb_migrations:/pb_migrations