title: Approaches to build a nodejs backend, use one or several instances?
body: <p>I am planning to build a nodejs application as back end of a web application.</p>
  
  <p>This server application will provide a rest api, websockets service and process to scrape some sites with a headless navigation (like zombie.js) each n hours to feed a database.</p>
  
  <p>I would to ask if it's a good approache build all the things in one nodejs instance or if it's better use several nodejs applications for every task.</p>