title: Laravel failed to run command "php artisan key:generate" in any docker with GitLab
body: <p>I use GitLab CI to run test a Laravel app. </p>
  
  <p>It always get issue at command <code>php artisan key:generate</code>:</p>
  
  <p><a href="https://i.stack.imgur.com/WAYMr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WAYMr.png" alt="enter image description here"></a></p>
  
  <blockquote>
    <p>Warning: require(/builds/anhduc-bkhn/laravel-gitlab-example/bootstrap/../vendor/autoload.php): failed to open stream: No such file or directory in /builds/anhduc-bkhn/laravel-gitlab-example/bootstrap/autoload.php on line 17</p>
    
    <p>Fatal error: require(): Failed opening required '/builds/anhduc-bkhn/laravel-gitlab-example/bootstrap/../vendor/autoload.php' (include_path='.:/usr/local/lib/php') in /builds/anhduc-bkhn/laravel-gitlab-example/bootstrap/autoload.php on line 17</p>
  </blockquote>
  
  <p>Please help me.</p>