Bootstrap the /api namespace

lib/music_library_web/controllers/collection_controller.ex

@@ -0,0 +1,11 @@
+defmodule MusicLibraryWeb.CollectionController do
+  use MusicLibraryWeb, :controller
+
+  alias MusicLibrary.Collection
+
+  def latest(conn, _params) do
+    latest_record = Collection.get_latest_record!()
+
+    render(conn, :show, record: latest_record)
+  end
+end