index.js

#!/usr/bin/env node

require('dotenv-extended').load({
  encoding: 'utf8',
  silent: true,
  path: '.env',
  defaults: '.env.defaults',
  schema: '.env.schema',
  errorOnMissing: false,
  errorOnExtra: false,
  assignToProcessEnv: true,
  overrideProcessEnv: false
});

/**
 * Module dependencies.
 */

const app = require('./app');
const debug = require('debug')('connecc-api:server');
const http = require('http');
const models = require('./models');

/**
 * Get port from environment and store in Express.
 */

const port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

const server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

models.sequelize.sync().then(function () {
  /**
   * Listen on provided port, on all network interfaces.
   */
  server.listen(port, function () {
    console.log('Express server listening on port ' + server.address().port);
    debug('Express server listening on port ' + server.address().port);
  });
  server.on('error', onError);
  server.on('listening', onListening);
});

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  const port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }
  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  const bind = typeof port === 'string' ?
    'Pipe ' + port :
    'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  const addr = server.address();
  const bind = typeof addr === 'string' ?
    'pipe ' + addr :
    'port ' + addr.port;
  debug('Listening on ' + bind);
}