Setting up as cronjob

*   *   *   *   *   php /var/www/vhosts/example.com/httpdocs/bin/cli.php demo:command -q

or

*   *   *   *   *   cd /var/www/vhosts/example.com/httpdocs/bin && php ./cli.php demo:command -q

Adapt the command to your specifications by replacing example.com with your domain name.

Note the -q (or --quiet) option at the end of the command - it serves as a flag to inform the Application that no output should be returned (unless it's an error).