title: docker: Can't use ls in mount directory
body: <p>I use
  <code>docker run -it -v $PWD/website:/var/www/html/website gerbawn/nginx /bin/bash</code>
  to start a docker container. But I can't use ls to look <code>/var/www/html/website</code> directory.</p>
  <p><a href="https://i.stack.imgur.com/I2yHr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/I2yHr.png" alt="image" /></a></p>
  <p>I had change directory permission to 777 but no use.</p>