Merge pull request 'add content_type like what it is in advertising exactily' (#7) from feature/minio-endpoint into master

Reviewed-on: #7

apps/chat/serializers/presign.py

@@ -3,6 +3,7 @@ from rest_framework import serializers
 
 class SignContentSerializer(serializers.Serializer):
     filename = serializers.CharField()
+    content_type = serializers.CharField()
 
 
 class PresignResultSerializer(serializers.Serializer):