adds prod container and fixes build issues

backend/playlist/views/api/user.py

@@ -2,7 +2,9 @@ from rest_framework.views import APIView
 from rest_framework.response import Response
 from django.contrib.auth.models import User
 from playlist.serializers import UserSerializer
+from drf_spectacular.utils import extend_schema
 
+@extend_schema(responses={200: UserSerializer})
 class UserListView(APIView):
     def get(self, request):
         users = User.objects.all()