You might want to take a look at https://easyengine.io/tutorials/nodejs/ghost-nginx/
I've also googled and I've found some Vultr's articles about setting up ghost on their VPS's, but those don't rely on EE though.
How to Deploy Ghost on Ubuntu 16.04
How to Deploy Ghost on Debian 8.7
Also
Another accurate article on Vultr's VPS + Ghost
Good luck setting it all up!