Hi Rip,
Thanks for the suggestion; I see a2ensite creates a symlinks within /etc/apache2/sites-enabled. But on my Centos 7 distribution this functionality is not available.
I suppose the alternative suggested for Centos distributions here would have the same result:
sudo ln -s /etc/httpd/sites-available/bikegeartracker.com.conf /etc/httpd/sites-enabled/bikegeartracker.com.conf
Is that correct? (reading on a2ensite functionality does not make it obvious for me)