chore: 重构数据库迁移与 nginx 配置目录

sproutgate-backend/docker-compose.yml

@@ -8,6 +8,11 @@ services:
     environment:
       PORT: "8080"
       DATA_DIR: /data
+      DB_HOST: ${DB_HOST}
+      DB_PORT: ${DB_PORT:-3306}
+      DB_USER: ${DB_USER}
+      DB_PASSWORD: ${DB_PASSWORD}
+      DB_NAME: ${DB_NAME:-sproutgate}
     volumes:
       - ./data:/data
     ports: