Using the latest version of Joomla, Gantry 5 and the Ambrosia theme. I need to install a snippet of javascript in the <head></head> of the site. I can't seem to be able to find the index.php file to do that. In Gantry 4, it is in the Templates folder, but not any longer in Gantry 5. Maybe there is another way to do this with Gantry 5? Could someone please direct me?