title: Laravel Nova - Include additional css files
body: <p>In Laravel Nova, how to include additional css files?</p>
  
  <p>I have tried following, but gives an error.</p>
  
  <pre><code>class NovaServiceProvider extends NovaApplicationServiceProvider
  {
      /**
      * Bootstrap any application services.
      *
      * @return void
      */
      public function boot()
      {
          parent::boot();
  
          Nova::style('admin', asset('css/admin.css'));
      }
      ...
  }
  </code></pre>
  
  <p>Under <code>public/css</code> folder I have <code>admin.css</code> file.</p>
  
  <p>Error:</p>
  
  <blockquote>
    <p>file_get_contents(<a href="http://localhost:8099/css/admin.css" rel="noreferrer">http://localhost:8099/css/admin.css</a>): failed to open
    stream: Cannot assign requested address
    {"exception":"[object]
    (ErrorException(code: 0):
    file_get_contents(<a href="http://localhost:8099/css/admin.css" rel="noreferrer">http://localhost:8099/css/admin.css</a>): failed to open
    stream: Cannot assign requested address at
    /var/www/nova/src/Http/Controllers/StyleController.php:20)</p>
  </blockquote>