modified gunicorn bind

artel/Dockerfile

@@ -57,4 +57,4 @@ RUN python manage.py collectstatic --noinput --clear
 #   PRACTICE. The database should be migrated manually or using the release
 #   phase facilities of your hosting platform. This is used only so the
 #   Wagtail instance can be started with a simple "docker run" command.
-CMD set -xe; python manage.py migrate --noinput; gunicorn artel.wsgi:application
+CMD set -xe; python manage.py migrate --noinput; gunicorn --bind=0.0.0.0:8000 artel.wsgi:application