say I own this domain (domain.com), In order for laravel 5 to work, I need to configure AllowOverride all for sub domain as well.

1 . I create api.conf as following

<VirtualHost *:80>
  ServerName api.domain.com
  DocumentRoot /var/www/html/api/public
  <Directory "/var/www/html/api/public">
    AllowOverride all
  </Directory>
</VirtualHost>

1. then I run a2ensite api.conf

2. service apache2 reload.
   However, When I type in api.domain.com, it display this This webpage is not available ERRNAMENOT_RESOLVED

Something wrong along the way, any ideas or suggests? thank you