add sparkpost webhook controller

services/app/lib/hexlet_basics_web/controllers/api/webhooks/sparkpost_controller.ex

@@ -0,0 +1,8 @@
+defmodule HexletBasicsWeb.Api.Webhooks.SparkpostController do
+  use HexletBasicsWeb, :controller
+
+  def process(conn, _params) do
+    conn
+    |> send_resp(200, "")
+  end
+end

services/app/lib/hexlet_basics_web/router.ex

@@ -59,6 +59,11 @@ defmodule HexletBasicsWeb.Router do
     plug(HexletBasicsWeb.Plugs.ApiRequireAuth)
   end
 
+  pipeline :api_for_webhooks do
+    plug(:accepts, ["json"])
+    plug(:fetch_session)
+  end
+
   scope "/auth", HexletBasicsWeb do
     pipe_through(:browser)
 
@@ -74,6 +79,12 @@ defmodule HexletBasicsWeb.Router do
     end
   end
 
+  scope "/api/webhooks", HexletBasicsWeb do
+    pipe_through(:api_for_webhooks)
+
+    post("sparkpost/process", Api.Webhooks.SparkpostController, :process)
+  end
+
   scope "/", HexletBasicsWeb do
     # Use the default browser stack
     pipe_through(:browser)