add mongodb-angular-expressjs-nodejs docker sample

Signed-off-by: Sohaib Manah <souhaibemanah@gmail.com>

mongodb-angular-expressjs-nodejs/backend/.env.example

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+MONGODB_URI=mongodb://mongo:27017

mongodb-angular-expressjs-nodejs/backend/.gitignore

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+node_modules
+.env

mongodb-angular-expressjs-nodejs/backend/Dockerfile

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+FROM node:19-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+EXPOSE 5000
+
+COPY . .
+
+CMD ["npm","start"]

mongodb-angular-expressjs-nodejs/backend/db/mongodb.js

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+import { MongoClient, ServerApiVersion } from "mongodb";
+import dotenv from "dotenv";
+dotenv.config();
+
+// Create a MongoClient with a MongoClientOptions object to set the Stable API version
+const client = new MongoClient(
+  process.env.MONGODB_URI || "mongodb://mongo:27017",
+  {
+    serverApi: {
+      version: ServerApiVersion.v1,
+      strict: true,
+      deprecationErrors: true,
+    },
+  }
+);
+
+try {
+  // Connect the client to the server (optional starting in v4.7)
+  await client.connect();
+
+  // Send a ping to confirm a successful connection
+  await client.db("admin").command({ ping: 1 });
+  console.log("Pinged your deployment. You successfully connected to MongoDB!");
+} finally {
+  // Ensures that the client will close when you finish/error
+  await client.close();
+}
+
+export default client.connect();

mongodb-angular-expressjs-nodejs/backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "Running Node.js and Express.js on Docker",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "start": "nodemon server.js"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.3",
+    "express": "^4.18.2",
+    "mongodb": "^5.1.0",
+    "nodemon": "^2.0.22"
+  },
+  "author": "",
+  "license": "MIT"
+}

mongodb-angular-expressjs-nodejs/backend/server.js

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+import express from "express";
+import client from "./db/mongodb.js";
+const app = express();
+import cors from "cors";
+
+app.use(cors("http://localhost:4200"));
+
+app.get("/", function (req, res) {
+  res.status(200).json({ message: "Hello World" });
+});
+
+app.listen(5000, function () {
+  console.log("Web application is listening on port 5000");
+});