added django_extensions to docker image

docker/Dockerfile

@@ -72,7 +72,7 @@ RUN --mount=type=cache,target=/pip-cache \
     -r requirements/uwu.txt \
     -r requirements/sso.txt \
     -r requirements/server-asgi.txt && \
-    pip install --cache-dir /pip-cache uwsgi
+    pip install --cache-dir /pip-cache uwsgi django_extensions
 
 FROM base as final
 ARG COMMIT

docker/entrypoint.sh

@@ -59,6 +59,9 @@ beat)
 manage)
   exec python manage.py ${*:2}
   ;;
+shell)
+  exec python manage.py shell_plus ${*:2}
+  ;;
 migrate)
   exec python manage.py migrate ${*:2}
   ;;