Initial commit.

.gitignore

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+**/node_modules

app.js

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+const express = require('express');
+const Mongo = require('./mongo');
+
+const app = express();
+const port = 3000;
+
+
+app.get('/test', (request, response) => {
+    const mongoClient = new Mongo();
+})
+
+app.listen(port, () => console.log('Mock is listening at port ', port, '\n'));

mongo.js

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+const mongodb = require('mongodb');
+const assert = require('assert');
+
+const mongoConfig = {
+    url: 'mongodb://localhost:27017',
+    username: 'express-user',
+    password: 'P@ssword1',
+    database: 'express-test'
+}
+
+class Mongo {
+    constructor() {
+        mongodb.MongoClient.connect(mongoConfig.url, (err, client) => {
+            assert.equal(null, err);
+            console.log('Connected successfuly to mongodb');
+            this.db = client.db(mongoConfig.database);
+
+            this.db.collection('test').find({}, (err, results) => {
+                results.forEach(console.log);
+            });
+
+            client.close();
+        })
+    }
+}
+
+module.exports = Mongo;

package.json

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+{
+  "name": "ExpressJS",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "nodemon ./app.js localhost 3000",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.17.1"
+  },
+  "devDependencies": {
+    "eslint": "^7.4.0",
+    "eslint-plugin-node": "^11.1.0",
+    "nodemon": "^2.0.4",
+    "mongodb": "^3.6.1"
+  }
+}