[fix] Fix the code which stores the image

+const express = require('express');
+const { User } = require("../models/User");
+const { auth } = require("../middleware/auth");
+const router = express.Router();
+
+
+var storage = multer.diskStorage({
+    destination: function (req, file, cb) {
+      cb(null, 'uploads/') // 어느 폴더에 저장할건지
+    },
+    filename: function (req, file, cb) {
+      cb(null, Date.now() + '_' + file.originalname) // 이미지 이름
+    }
+  })
+   
+  var upload = multer({ storage: storage })
+
+router.post('/image', (req, res) => {
+
+    // 클라이언트로부터 받은 이미지 저장
+    upload(req, res, err => {
+        if (err) return req.json({ success: false, err })
+        return res.json({success: true, filePath: res.req.file.path, fileName: res.req.file.filename})   
+    }
+    )
+
+})
+
+module.exports = router;