title: Symfony call Command from controller as background task
body: <p>I want to run a Symfony Console Command from a controller. How to do so is explained in the <a href="https://symfony.com/doc/3.4/console/command_in_controller.html" rel="noreferrer">documentation</a>.</p>
  
  <p>Now my controller waits until the Command is finished. But I want the Command to be executed as a background task (like a cronjob). So the controller doesn't need to wait to complete the Command, only start it.</p>
  
  <p>Is this possible with Symfony Console?</p>