title: Response Time - NodeJS + Express
body: <p>I have a little problem with my application.
  My architecture:</p>
  
  <ul>
  <li>Angular 6 (front)</li>
  <li>NodeJS + Express + MongoDB (back)</li>
  </ul>
  
  <p>There is a part, in my NodeJS application, that communicates with a REST API.</p>
  
  <p>When an user clicks on button on the Angular WebSite, I send a request to Express.</p>
  
  <p>In my Express application, I send another request to the API to retrieve information.</p>
  
  <p>But this process takes a lot of time. My request timeout</p>
  
  <p>What is the best solution to keep my process working after the Express reply has been sent?
  Should I do otherwise?</p>