Add custom Ace Theme To Laravel Voyager

Hi everyone in My Voyager.php in config i added

'additional_js' => [
      //'js/custom.js',
      'js/theme-dracula.js',
      'js/mode-php.js',
  ],

and in voyager admin panel table bread i added

 {
      "theme": "dracula",
      "language": "php"
 }

so i get this errors in database

      theme-dracula.js:1 Uncaught ReferenceError: define is not defined
       at theme-dracula.js:1

      mode-php.js:1 Uncaught ReferenceError: define is not defined
      at mode-php.js:1

 GET http://127.0.0.1:8000/admin/posts/theme-racula.js net::ERR_ABORTED 404 (Not Found)

 GET http://127.0.0.1:8000/admin/posts/mode-php.js net::ERR_ABORTED 404 (Not Found) 

Some ScreenShots For the error

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via Chebli Mohamed