Finish admin dashboard and update sql code

backend/routes/recommendation.js

@@ -0,0 +1,8 @@
+// routes/product.js
+const express = require("express");
+const { RecommondationByUserId } = require("../controllers/recommendation");
+const router = express.Router();
+
+router.post("/recommended", RecommondationByUserId);
+
+module.exports = router;