title: Running a docker from an ECS container instance
body: <p>I already have an ECS cluster setup with tasks that runs my app on ECS container instances.
  Now, given a docker image, I need to be able to run it from inside my app, and it must run on the same EC2 instance my app runs on.</p>
  
  <p>I read that running docker inside a docker is not recommended and that the best practice is to create a sibling docker.
  It means my EC2 instance should run 2 containers:</p>
  
  <ol>
  <li>My app, maintained be ECS.</li>
  <li>the docker image my app decided to run.</li>
  </ol>
  
  <p>How do I achieve such a setup? Does ECS supports this?</p>