final changes

backend/middleware/upload.js

@@ -0,0 +1,11 @@
+const multer = require("multer");
+const path = require("path");
+
+const storage = multer.diskStorage({
+  destination: "uploads/",
+  filename: (req, file, cb) => {
+    cb(null, Date.now() + path.extname(file.originalname));
+  },
+});
+
+module.exports = multer({ storage });