admin(ui): add node configuration page

app/Http/Controllers/Api/Application/Nodes/NodeConfigurationController.php

@@ -14,10 +14,15 @@ class NodeConfigurationController extends ApplicationApiController
      * to remote machines so long as an API key is provided to the machine to make the request
      * with, and the node is known.
      *
-     * @return \Illuminate\Http\JsonResponse
+     * @return string
+     * @throws \Illuminate\Contracts\Container\BindingResolutionException
      */
     public function __invoke(GetNodeRequest $request, Node $node)
     {
+        if ($request->query('format') === 'yaml') {
+            return $node->getYamlConfiguration();
+        }
+
         return new JsonResponse($node->getConfiguration());
     }
 }