Set content type when serving object

Fixes #37

activities/views/posts.py

@@ -75,7 +75,10 @@ class Individual(TemplateView):
         # If this not a local post, redirect to its canonical URI
         if not self.post_obj.local:
             return redirect(self.post_obj.object_uri)
-        return JsonResponse(canonicalise(self.post_obj.to_ap(), include_security=True))
+        return JsonResponse(
+            canonicalise(self.post_obj.to_ap(), include_security=True),
+            content_type="application/activity+json",
+        )
 
 
 @method_decorator(identity_required, name="dispatch")

users/views/identity.py

@@ -55,7 +55,10 @@ class ViewIdentity(ListView):
         # If this not a local actor, redirect to their canonical URI
         if not identity.local:
             return redirect(identity.actor_uri)
-        return JsonResponse(canonicalise(identity.to_ap(), include_security=True))
+        return JsonResponse(
+            canonicalise(identity.to_ap(), include_security=True),
+            content_type="application/activity+json",
+        )
 
     def get_queryset(self):
         return (