simple-express-server.js

// Get process environment or set default environment to development
const ENV = process.env.NODE_ENV || 'development';

const http = require('http');
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
let server;

app.set('root', __dirname);
app.set('env', ENV);

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.disable('x-powered-by');

app.get('/api/status', (req, res, next) => {
  res.json({ message: 'API is running.' });
});

app.use((err, req, res, next) => {
  console.error(err);
  res.status(500).json(err);
});

if (!module.parent) {
  server = http.createServer(app);
  server.listen(config.port || 3000, config.hostname, () => {
  let addr = server.address();
    console.info('---');
    console.info('%s is running.', config.app.name);
    console.info('Hostname: %s', addr.address);
    console.info('Port: %s', addr.port);
    console.info('Environment: %s', ENV.toLowerCase());
    console.info('Access: %s', config.baseUrl);
    console.info('---');
  });
}

module.exports = app;