Dog Barks Hi!
To create the site, setup configuration e.g.
   sudo nano /etc/apache2/sites-available/site.wolfkun.com.conf
depending on setup (e.g. blazor vs not blazor), can create subdir in
/var/www/site.wolfkun.com (not blazor)
or can put it anyware if blazor
Then enable site
    sudo a2ensite site.wolfkun.com
(or whichever domain using)
Finally, restart apache
    sudo service apache2 restart