feat: major update - MySQL, chat, wishlist, PWA, admin overhaul

mengyastore-backend/docker-compose.yml

@@ -8,6 +8,9 @@ services:
     environment:
       GIN_MODE: release
       TZ: Asia/Shanghai
+      # Production MySQL DSN — uses internal network address.
+      # Change to TestDSN or override via .env file for local testing.
+      DATABASE_DSN: "mengyastore:mengyastore@tcp(192.168.1.100:3306)/mengyastore?charset=utf8mb4&parseTime=True&loc=Local"
     volumes:
-      - ./data:/app/data
+      - ./config.json:/app/config.json:ro
     restart: unless-stopped