Python requirements and Docker version upgrades (#826)

v3.0.0: Python, Django, Celery and other version upgrades

cms/urls.py

@@ -1,7 +1,7 @@
 import debug_toolbar
-from django.conf.urls import include, re_path
+from django.conf.urls import include
 from django.contrib import admin
-from django.urls import path
+from django.urls import path, re_path
 from django.views.generic.base import TemplateView
 from drf_yasg import openapi
 from drf_yasg.views import get_schema_view