connect ngrok

[fmunoz92]

Add ngrok as dependency and add to boot.js something like that:

    .....
    .then(createServer);
    .then(connectNgrok);

function connectNgrok()
  if (process.env.NODE_ENV === 'development') {
    ngrok.connect(app.get('port'), (err, url) => {
      ...
    });
  }
  // return promise
}