Add an authenticated fetch route for members

If the member is remote, it redirects to original instance

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/web/router.ex

@@ -105,6 +105,7 @@ defmodule Mobilizon.Web.Router do
     get("/@:name/following", ActivityPubController, :following)
     get("/@:name/followers", ActivityPubController, :followers)
     get("/@:name/members", ActivityPubController, :members)
+    get("/member/:uuid", ActivityPubController, :member)
   end
 
   scope "/", Mobilizon.Web do