Serve local cover images

lib/music_library_web/controllers/image_controller.ex

@@ -0,0 +1,17 @@
+defmodule MusicLibraryWeb.ImageController do
+  use MusicLibraryWeb, :controller
+
+  alias MusicLibrary.Records
+
+  def show(conn, %{"record_id" => record_id}) do
+    {:ok, image_data} = Records.get_image!(record_id)
+
+    if image_data do
+      conn
+      |> put_resp_content_type("image/jpeg", "utf-8")
+      |> send_resp(200, image_data)
+    else
+      conn |> send_resp(404, "Not found")
+    end
+  end
+end