title: Lumen php artisan config:cache not found
body: <p>I'm trying out the PHP micro Framework Lumen (from laravel).
  When I  set up Lumen and I try to use the <code>php artisan config:cache</code> command like in Laravel, I get this error :</p>
  
  <blockquote>
    <p>[InvalidArgumentException]<br>
      There are no commands defined in the "config" namespace.</p>
  </blockquote>
  
  <p>So I have problem when I try to deploy the files to server, so I have to change <code>.env</code> file to change the database username and password.</p>
  
  <p>This makes me think <code>config</code> is not available in artisan </p>
  
  <p>How can I add it to artisan ? </p>