The purpose is to provide a separate vhost for centrally installed applications like a webmail client or phpmyadmin so that these apps dont have to run as www-data user.
I go there <ip>:8081 and there is nothing there. PHPMYADMIN seems to run off of 8080 https://xxx.xxxxxxxxx.com:8080/phpmyadmin/ and WEBMAIL seems to run off 80 as no port is specified http://xxxxxxxxxx.com/webmail/src/login.php . So should I just temporarily disable the apps.vhost until something that uses it is loaded?