AI: 排查预览问题

package.json

@@ -2,7 +2,7 @@
   "name": "member-attendance-system",
   "version": "1.0.0",
   "description": "会友信息考勤打卡系统",
-  "main": "index.js",
+  "main": "server/index.js",
   "scripts": {
     "start": "node server/index.js",
     "dev": "concurrently \"npm run server\" \"npm run client\"",
@@ -11,13 +11,13 @@
     "install-all": "npm install && cd client && npm install"
   },
   "dependencies": {
+    "express": "^4.17.1",
+    "mongoose": "^6.0.12",
     "cors": "^2.8.5",
     "dotenv": "^10.0.0",
     "exceljs": "^4.3.0",
-    "express": "^4.17.1",
-    "mongoose": "^6.0.12",
-    "mqtt": "^4.3.8",
-    "pdfkit": "^0.13.0"
+    "pdfkit": "^0.13.0",
+    "mqtt": "^4.3.7"
   },
   "devDependencies": {
     "concurrently": "^6.3.0",