Can i use in VIrtualmin to create domain and then EasyEngine to set up fast NGINX+MariaDB+HHVM?
I don’t think that’s possible. But you can use Nginx and Virtualmin together.
https://tjosm.com/4937/install-virtualmin-nginx-php-7-mariadb-ubuntu-16-04/
That’d be a pretty big hassle, I think; Virtualmin is super flexible, but you’d need to manually configure a bunch of stuff to make all that work, assuming it installs nginx and mariadb from sources other than system packages.
But, Virtualmin supports nginx and MariaDB out of the box. I suspect HHVM would work OK, too, but haven’t poked at it (PHP7 brings similar performance for most workloads without the pain of a compiled, and slightly less compatible, PHP version). We’ve also got automated WordPress installation and updates in Virtualmin Pro.