run createn of default group and rtmp application on container start

Dockerfile

@@ -24,4 +24,4 @@ ADD --chown=portier:portier . /app
 RUN ./manage.py collectstatic --noinput --link
 RUN ./manage.py compilemessages
 
-CMD ["/app/start.sh", "migrate_start"]
+CMD ["/app/start.sh"]

start.sh

@@ -23,7 +23,13 @@ migrate() {
   python manage.py migrate
 }
 
+initialize() {
+  python manage.py createdefaultgroup
+  python manage.py createdefaultapplication
+}
+
 wait_for_redis
 wait_for_database
 migrate
+initialize
 supervisord -n -c /etc/supervisord.conf