Added backend folder structure.

Backend/Middlewares/multer.js

@@ -0,0 +1,20 @@
+const multer = require("multer");
+
+const storage = multer.diskStorage({
+
+  destination: function (req, file, cb) {
+    cb(null, "./public/images");
+  },
+
+  filename: function (req, file, cb) {
+    const uniquePrefix = Date.now();
+    cb(null, uniquePrefix + "-" + file.originalname);
+  },
+
+  
+});
+
+
+const upload = multer({ storage: storage });
+
+module.exports = upload;