Get live site url

-- HikaShop version -- : 4.4.4
-- Joomla version -- : 3.10.3
-- PHP version -- : 7.4

Hi

I'm adding some OpenGraph tags to my products in product > show_default.php like this:
JFactory::getDocument()->setMetaData('og:image', ' domain.xxx/images/com_hikashop/upload/ ' . $this->row->ogimage, 'property');

There I need domain.xxx to be something that HikaShop sees as the live site, so when I move the site from the sandbox to the live site, I don't need to remember to change this.

Something like in the emails VAR:LIVE_SITE

Regards
Thomas

Of course, my mistake - I had my mind set on that VAR:LIVE_SITE

Thank you!