add media-endpoint to config query

lib/chiya_web/indie/micropub_handler.ex

@@ -2,6 +2,10 @@ defmodule ChiyaWeb.Indie.MicropubHandler do
   @behaviour PlugMicropub.HandlerBehaviour
   require Logger
 
+  use Phoenix.VerifiedRoutes,
+    endpoint: ChiyaWeb.Endpoint,
+    router: ChiyaWeb.Router
+
   alias ChiyaWeb.Indie.Properties, as: Props
   alias ChiyaWeb.Indie.Token
 
@@ -104,8 +108,8 @@ defmodule ChiyaWeb.Indie.MicropubHandler do
       :ok ->
         channels = Chiya.Channels.list_channels()
 
-        {:ok,
-         %{
+        config = %{
+          "media-endpoint" => url(~p"/indie/micropub/media"),
           "destination" => [],
           "post-types" => [
             %{
@@ -120,7 +124,9 @@ defmodule ChiyaWeb.Indie.MicropubHandler do
                 "name" => c.name
               }
             end)
-         }}
+        }
+
+        {:ok, config}
 
       _ ->
         {:error, :insufficient_scope}