Newbie question: What's required to set up a server to be a provider of Ghost blogs?

This offer got me thinking about something I've been curious for a while.

Let's say I have a dedicated server and want to set it up to be a provider of Ghost blogs. It would be for personal/beta use at first and then maybe something commercial. Other than the Ghost application and Nginx, what other applications would be required? I'd like to keep everything open source if possible. Are we talking about just a control panel? I understand this is a newbie question and semi-open ended, but I can refine the question if you could provide some guidance.

http://ift.tt/1dvHQ0Z