fix: 数据持久化到/app/data目录，简化部署配置

- 配置文件和SQLite数据库存储在/app/data
- Docker volume持久化数据
- 无需预设环境变量，安装向导自动配置

docker-compose.prod.yml

@@ -1,4 +1,16 @@
 services:
+  app:
+    image: ghcr.io/cmakecpp/verify:main
+    container_name: verify-app
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-8080}:8080"
+    volumes:
+      - app_data:/app/data
+      - uploads:/app/uploads
+    networks:
+      - verify-network
+
   mysql:
     image: mysql:8.0
     container_name: verify-mysql
@@ -8,42 +20,13 @@ services:
       MYSQL_DATABASE: ${MYSQL_DATABASE:-verification_platform}
       MYSQL_CHARACTER_SET_SERVER: utf8mb4
       MYSQL_COLLATION_SERVER: utf8mb4_unicode_ci
-    ports:
-      - "${MYSQL_PORT:-3306}:3306"
     volumes:
       - mysql_data:/var/lib/mysql
     networks:
       - verify-network
-    healthcheck:
-      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-
-  app:
-    image: ghcr.io/cmakecpp/verify:main
-    container_name: verify-app
-    restart: unless-stopped
-    environment:
-      - APP_ENV=production
-      - APP_PORT=8080
-      - APP_JWT_SECRET=${JWT_SECRET:-your-jwt-secret-change-me}
-      - DATABASE_HOST=mysql
-      - DATABASE_PORT=3306
-      - DATABASE_NAME=${MYSQL_DATABASE:-verification_platform}
-      - DATABASE_USERNAME=root
-      - DATABASE_PASSWORD=${MYSQL_ROOT_PASSWORD:-root123456}
-    ports:
-      - "${APP_PORT:-8080}:8080"
-    volumes:
-      - uploads:/app/uploads
-    depends_on:
-      mysql:
-        condition: service_healthy
-    networks:
-      - verify-network
 
 volumes:
+  app_data:
   mysql_data:
   uploads: