server.js

'use strict';
/*eslint no-console: ["error", { allow: ["warn", "error", "log"] }] */
const express = require('express');
const app = express();
const mongoose = require('mongoose');
const morgan = require('morgan');
const bodyParser = require('body-parser');
const routes = require('./app/routes');
const config = require('config');
const path = require('path');

const port = process.env.PORT || config.PORT || 3000;

// DB options
const options = {
    server: {
        socketOptions: {
            keepAlive: 1,
            connectTimeoutMS: 3000
        }
    },
    replset: {
        socketOptions: {
            keepAlive: 1,
            connectTimeoutMS: 3000
        }
    }
};

// DB connection
const mongoURI = process.env.DBHost || config.DBHost;
mongoose.connect(mongoURI, options);

const db = mongoose.connection;


db.on('error', console.error.bind(console, 'connection error: '));

if (config.util.getEnv('NODE_ENV') !== 'test') {
    // use morgan to log at command line
    app.use(morgan('combined'));
}

// Parse application/json and look for raw text
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: true
}));
app.use(bodyParser.text());
app.use(bodyParser.json({
    type: 'application/json'
}));
//API DOC
app.use('/doc', express.static(path.join(__dirname, './apidoc')));

//Enable cross
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");
    next();
})
routes(app);

app.listen(port);
console.log('Listening on port ' + port);

module.exports = app;