Check for OL free trial instead of host as it may be fragile indicator

services/web/app/views/layout.pug

@@ -96,7 +96,7 @@ html(itemscope, itemtype='http://schema.org/Product')
 					indexName : '!{settings.templates.indexName}'
 				}
 
-		- if (settings.overleaf && settings.overleaf.host)
+		- if (settings.overleaf && settings.overleaf.useOLFreeTrial)
 			script.
 				window.redirectToOLFreeTrialUrl = '!{settings.overleaf.host}/users/trial'