server.js

const express = require('express'),
      app = express(),
      bodyParser = require('body-parser'),
      path = require('path'),
      port = process.env.PORT || 3000,
      mongoose = require('mongoose'),
      logger = require('morgan');

let api = require('./server/routes/api')

// Angular dist output folder
app.use(express.static(path.join(__dirname, 'dist')));

// Parsers
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));

// CORS
app.use(function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, access-token");
    next();
});

// app.use(logger(':remote-addr - :remote-user [:date[clf]] ":method :url HTTP/:http-version" :status :res[content-length] :response-time ms'));

mongoose.connect(process.env.HOST);

let db = mongoose.connection;

db.on('error', function(err) {
    console.log("Unable to connect to MongoDB");
    console.log("Error be like: ", err);
});

db.once('open', function() {
    console.log("Connected to DB");

    app.listen(port, function() {
        console.log("App running on port " + port);
    });

    app.use('/api', api);

    // Send all other requests to the Angular app
    app.get('*', (req, res) => {
        res.sendFile(path.join(__dirname, 'dist/index.html'));
    })
});