When you start the container you can specify which port you want using the -p command.

This command would start it on port 8000, but you could change to any other port you want, assuming it is free.

$ docker run -d -p :8000 kencochrane/django-docker

I'm also pretty sure that when your host is restarted the container will start back up when docker does, if the container was running before the host was restarted.