If it’s shared hosting, then 1.8 isn’t suitable for installation there.
You need to be able to reconfigure the way the webserver is setup per the instructions in the install guide. Most shared hosting won’t allow you to do so, and so can’t be used.
You also need to be able to install and run XTR and XMR, which again won’t work well on shared hosting.
Our suggested installation with Docker on to an Ubuntu 16.04 LTS VPS with DigitalOcean or Vultr is the quickest and easiest route to a supportable install.