Update repo docs with Fedora Nest info

That was quite an awesome talk at https://fedoraproject.org/wiki/Nest_with_Fedora_2021_Schedule#Saturday_August_7th

I am looking through the slides https://raw.githubusercontent.com/t0xic0der/t0xic0der/master/NestWithFedora2021_1141IST_10Aug2021_FedoraGraphs.pdf and it still hard to understand where JSON and SVG should go. A step by step tutorial on how thing works at the current state would be nice, even if those are not ideal.

It is can help turning on GitHub Pages, and then http://t0xic0der.github.io/impression/homepage.html will be visible rendered.