title: docker-compose creates file owned by root
body: <p>I followed all steps described here: <a href="https://docs.docker.com/compose/django/" rel="noreferrer">https://docs.docker.com/compose/django/</a></p>
  
  <p>Everything runs, but the problem is that created files are owned by <code>root</code>. I have no idea how to change it.</p>
  
  <p>I'm able to run <code>docker run hello-world</code> - no <code>sudo</code> required.</p>
  
  <p>The command I run: <code>docker-compose run web django-admin.py startproject composeexample .</code></p>
  
  <p>Any clues how to force compose to use my user as the owner?</p>