Update seeders to not error out and allow updating values quickly.

app/Models/Service.php

@@ -49,7 +49,7 @@ class Service extends Model
      *
      * @return string
      */
-    public function defaultIndexFile()
+    public static function defaultIndexFile()
     {
         return <<<'EOF'
 'use strict';

app/Repositories/ServiceRepository.php

@@ -59,7 +59,7 @@ class ServiceRepository
                 'description' => (isset($data['description'])) ? $data['description'] : null,
                 'folder' => $data['folder'],
                 'startup' => (isset($data['startup'])) ? $data['startup'] : null,
-                'index_file' => $service->defaultIndexFile(),
+                'index_file' => Service::defaultIndexFile(),
             ])->save();
 
             // It is possible for an event to return false or throw an exception