mongo-connection.js

 var express = require('express'),
     app = express(),
     engines = require('consolidate'),
     MongoClient = require('mongodb').MongoClient,
     assert = require('assert')

 app.engine('html', engines.nunjucks)
 app.set('view engine', 'html')
 app.set('views', __dirname + '/views')
 
  MongoClient.connect('mongodb://localhost:27017/test', function (err, db) {
    assert.equal(null, err)
    console.log('Successfully connected to MongoDB')
 
    app.get('/', function (req, res) {
      // Express will create an appropriate HTTP response including, length, headers, etc. 
      // and content with 'Hello..    .' So express does a lot of work for us here
      db.collection('names').find({}).toArray(function (err, docs) {
        console.log(docs)
        res.render('Hello', { 'names': docs})
      })
    })
    app.use(function (req, res) {
      res.sendStatus(404)
    })
 
    var server = app.listen(3000, function () {
      var port = server.address().port
      console.log('Express server listening on port %s', port)
    })
  })