title: novnc: How to run websockify automatically
body: <p>Maybe someone can help me with novnc.
  I want to use the novnc service, so I installed it on a debian machine with debian packages. I am able to manually establish a vnc session over a proxy server to another vnc server. But currently I have to manually start the websockify service on my proxy.</p>
  
  <p>How can I start this service automatically? And if the user finished his session how do I tell the proxy server to close the session?
  I only want to use novnc without the whole openstack installation.</p>
  
  <p>In addition the service should run for multiple users. For example user1 should connect to proxy-ip:5901 and user2 should connect to proxy-ip:5902. So I need to start the websockify service on different ports at the same time.</p>