fix document_export issue (#191)

src/documents/management/commands/document_exporter.py

@@ -6,7 +6,7 @@ import time
 
 import tqdm
 from django.conf import settings
-from django.contrib.auth.models import User
+from django.contrib.auth.models import User, Group
 from django.core import serializers
 from django.core.management.base import BaseCommand, CommandError
 from django.db import transaction
@@ -144,6 +144,8 @@ class Command(BaseCommand):
                 serializers.serialize("json", SavedViewFilterRule.objects.all())
             )
 
+            manifest += json.loads(serializers.serialize("json", Group.objects.all()))
+
             manifest += json.loads(serializers.serialize("json", User.objects.all()))
 
         # 3. Export files from each document