fix up gunicorn conf

docker/gunicorn.conf.py

@@ -1,4 +1,4 @@
-bind = '[::]:8000'
+bind = ['[::]:8000', 'localhost:8000']
 backlog = 2048
 workers = 3
 worker_class = 'sync'

docker/supervisord.conf

@@ -8,7 +8,7 @@ loglevel=info                ; log level; default info; others: debug,warn,trace
 user=root
 
 [program:gunicorn]
-command=gunicorn -c /usr/src/paperless/gunicorn.conf.py -b '[::]:8000' paperless.wsgi
+command=gunicorn -c /usr/src/paperless/gunicorn.conf.py paperless.wsgi
 user=paperless
 
 stdout_logfile=/dev/stdout