feat: fix compose yml

docker-compose.yml

@@ -1,19 +1,33 @@
 services:
+  # 1. 后端服务 (Node.js + Express + SMTP Server)
   backend:
     build: ./backend
-    container_name: email-backend-container
+    container_name: email-backend
     restart: always
-    ports:
-      - "5182:5182" # API port
-      - "25:25"     # SMTP port
-    environment:
-      - DB_HOST=43.143.145.172     # 替换为您的外部数据库主机名或IP
-      - DB_USER=root     # 替换为您的数据库用户名
-      - DB_PASSWORD=kyff145972 # 替换为您的数据库密码
-      - DB_NAME=maildb       # 替换为您的数据库名称
+    env_file:
+      - compose.full.env
+    networks:
+      - email-network
+    # 可根据需要暴露端口给外部
+    # ports:
+    #   - "5182:5182"
+    #   - "25:25"
+
+  # 2. 数据库服务 (MySQL)
+  mysql:
+    image: mysql:8.0
+    container_name: email-mysql
+    restart: always
+    env_file:
+      - compose.env
+    volumes:
+      - mysql-data:/var/lib/mysql
     networks:
       - email-network
 
 networks:
   email-network:
-    driver: bridge
+    driver: bridge
+
+volumes:
+  mysql-data: {}