更新PM2配置并添加相关脚本

backend/package.json

@@ -13,7 +13,12 @@
     "init-test-data": "node scripts/init-test-data.js",
     "test-api": "node scripts/test-api-endpoints.js",
     "test-db": "node scripts/test-database-connection.js",
-    "start-scripts": "chmod +x *.sh"
+    "start-scripts": "chmod +x *.sh",
+    "pm2:start": "pm2 start ecosystem.config.js",
+    "pm2:stop": "pm2 stop ecosystem.config.js",
+    "pm2:restart": "pm2 restart ecosystem.config.js",
+    "pm2:status": "pm2 status",
+    "pm2:logs": "pm2 logs"
   },
   "keywords": [
     "mini-program",
@@ -45,7 +50,8 @@
     "swagger-jsdoc": "^6.2.8",
     "swagger-ui-express": "^5.0.1",
     "winston": "^3.11.0",
-    "xss-clean": "^0.1.4"
+    "xss-clean": "^0.1.4",
+    "pm2": "^5.3.0"
   },
   "devDependencies": {
     "eslint": "^8.56.0",