add tag for announcement

announcement/views/admin.py

@@ -16,6 +16,7 @@ class AnnouncementAdminAPI(APIView):
         data = request.data
         announcement = Announcement.objects.create(title=data["title"],
                                                    content=data["content"],
+                                                   tag=data["tag"],
                                                    created_by=request.user,
                                                    visible=data["visible"])
         return self.success(AnnouncementSerializer(announcement).data)