Yes

backend/.env.example

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+PORT=5000
+DB_URI=mongodb://localhost:27017/
+NODE_ENV=development

backend/.gitignore

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+# Node dependencies
+node_modules
+
+# Logs
+logs
+*.log
+
+# Misc
+.DS_Store
+.fleet
+.idea
+
+# Local env files
+.env
+.env.*
+!.env.example

backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "license": "ISC",
+  "author": "",
+  "type": "commonjs",
+  "main": "src/index.js",
+  "scripts": {
+    "dev": "nodemon src/index.js"
+  },
+  "dependencies": {
+    "dotenv": "^17.3.1",
+    "express": "^5.2.1",
+    "mongoose": "^9.3.0",
+    "nodemon": "^3.1.14"
+  }
+}

backend/src/db.js

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+const mongoose = require("mongoose");
+
+const connectDB = async () => {
+  try {
+    await mongoose.connect(process.env.DB_URI);
+
+    console.log("MongoDB connected");
+  } catch (error) {
+    console.error("MongoDB connection error:", error);
+    process.exit(1);
+  }
+};
+
+module.exports = connectDB;

backend/src/index.js

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+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");
+});