Allow to run nginx+gunicorn in Docker container

deployment/docker/pretix.bash

@@ -19,7 +19,11 @@ fi
 python3 -m pretix migrate --noinput
 
 if [ "$1" == "all" ]; then
-    exec sudo -E /usr/bin/supervisord -n -c /etc/supervisord.conf
+    exec sudo -E /usr/bin/supervisord -n -c /etc/supervisord.all.conf
+fi
+
+if [ "$1" == "web" ]; then
+    exec sudo -E /usr/bin/supervisord -n -c /etc/supervisord.web.conf
 fi
 
 if [ "$1" == "webworker" ]; then
@@ -37,10 +41,6 @@ if [ "$1" == "taskworker" ]; then
     exec celery -A pretix.celery_app worker -l info "$@"
 fi
 
-if [ "$1" == "shell" ]; then
-    exec python3 -m pretix shell
-fi
-
 if [ "$1" == "upgrade" ]; then
     exec python3 -m pretix updatestyles
 fi