fix: correct script section formatting in package.json

backend/package.json

@@ -4,6 +4,7 @@
   "description": "",
   "main": "index.js",
   "scripts": {
+    "start": "node server.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],
@@ -15,8 +16,5 @@
     "dotenv": "^16.5.0",
     "express": "^5.1.0",
     "nodemailer": "^7.0.3"
-  }, "scripts": {
-  "start": "node server.js",
-  "test": "echo \"Error: no test specified\" && exit 1"
   }
 }