title: Python script produces zombie processes only in Docker
body: <p>I have quite complicated setup with </p>
  
  <ul>
  <li>Luigi <a href="https://github.com/spotify/luigi" rel="nofollow noreferrer">https://github.com/spotify/luigi</a></li>
  <li><a href="https://github.com/kennethreitz/requests-html" rel="nofollow noreferrer">https://github.com/kennethreitz/requests-html</a></li>
  <li>and <a href="https://github.com/miyakogi/pyppeteer" rel="nofollow noreferrer">https://github.com/miyakogi/pyppeteer</a></li>
  </ul>
  
  <p>But long story short - everything works fine at my local Ubuntu (17.10) desktop, but when run in Docker(18.03.0-ce) via docker-compose(1.18.0) (config version 3.3, some related details here <a href="https://github.com/miyakogi/pyppeteer/issues/14" rel="nofollow noreferrer">https://github.com/miyakogi/pyppeteer/issues/14</a>) it bloats up with zombie chrome processes spawned from python.</p>
  
  <p>Any ideas why it might happen and what to do with it?</p>
  
  <p><a href="https://i.stack.imgur.com/HhPlH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HhPlH.png" alt="enter image description here"></a></p>