подправил порты

.env

@@ -10,3 +10,7 @@ DB_HOST=db
 # todo потом установить домен для продакшена
 ALLOWED_HOSTS=192.168.1.108,shiftflow.tertelius.space
 CSRF_ORIGINS=http://192.168.1.108,https://shiftflow.tertelius.space
+
+DJANGO_SUPERUSER_USERNAME=ack
+DJANGO_SUPERUSER_PASSWORD=123
+DJANGO_SUPERUSER_EMAIL=admin@test.ru

docker-compose.yml

@@ -31,7 +31,7 @@ services:
       - staticfiles:/app/staticfiles:ro
       - mediafiles:/app/media:ro
     ports:
-      - "8085:80"
+      - "80:8000"
     depends_on:
       - web
 

entrypoint.sh

@@ -3,5 +3,6 @@ echo "Collecting static files..."
 python manage.py collectstatic --noinput
 echo "Applying database migrations..."
 python manage.py migrate --noinput
+python manage.py createsuperuser --no-input || true
 echo "Starting Gunicorn..."
 exec "$@"