Yes

backend/src/index.js

@@ -0,0 +1,16 @@
+const express = require("express");
+
+require('dotenv').config();
+const app = express();
+const connectDB = require("./db");
+
+// connect database
+connectDB();
+
+app.get("/", (req, res) => {
+  res.send("Hello from Proxmox container!");
+});
+
+app.listen(5000, () => {
+  console.log("Server running on port 5000");
+});