add mongodb-angular-expressjs-nodejs docker sample

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

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

@@ -0,0 +1,29 @@
+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();