The minimal server requirements for Pagestead can be found here.
If you’re looking to install Pagestead on a VPS and you will using our free installation service (offered to customers who purchase either the Professional package or the Enterprise package), we would advice to use Digital Ocean. More specifically we recommend setting up a new droplet with CentOS v7.4 x64. You can start with either a 512MB droplet or a 1GB droplet and upgrade to a better one when needed (Digital Ocean makes upgrading your VPS very simple).
We do not recommend using a WHM/cPanel server. For more information, please have a look at this article.