Looks like a nice tool. But I didn't understand the requirement.
The README says that if I have a graph.svg and graph.txt in my directory, I can put as many graphs and start the web server. Still not getting the use of it.
I tried to clear up things in the README. The tool is inspired by Jekyll, it will build a static website for your graphs (that you already have), and some metadata you write to configure how the graphs will be displayed in the website.