title: Spawn a worker container and kill it when task completed with docker without orchestrator
body: <p>I have the following stack of containers I run with docker compose:</p>
  
  <ul>
  <li>front end</li>
  <li>nodejs API</li>
  <li>mongoDB</li>
  <li>nodejs worker 1 to import data in DB massively on demand (through API trigger)</li>
  <li>nodejs worker 2 but importing data from another source</li>
  <li>nodejs worker clone 3...</li>
  </ul>
  
  <p>I don't want to keep the workers up between imports, that could be weeks spaced.</p>
  
  <p>What would be a good way of achieving this? Is an orchestrator necessary to avoid code shananigans?</p>