mini_huahua/server.js

const express    = require('express');
const MongoClient  = require('mongodb').MongoClient;
const bodyParser   = require('body-parser');
const app      = express();
const db       = require('./config/db');
const port = 8000;
app.use(bodyParser.urlencoded({ extended: true }));

MongoClient.connect(db.url, (err, database) => {
    if (err) return console.log(err)
    // Make sure you add the database name and not the collection name
     database.db("test")
    require('./app/routes')(app, database);
    app.listen(port, () => {
     console.log('We are live on ' + port);
    });        
})