Looks like they answer that on the new site. The last bullet says to, on github, fork the project and do a pull request, which is the typical way to contribute patches on GitHub. Hope this helps!
Edit: i defer to eliasp for correctness; if you want to submit patches to the Enyo project, my comment is still correct ;)
yes, Electron is a nice framework, but to say it is unique is quite a stretch. what about NW.js or enyo? Electron did get it right, but it's only a matter of time before there's even a better way of doing things.
but i digress, because that wasn't my point at all. op says: >but at the moment I am having a lot of trouble grasping how html, css, and js work together to produce a web app.
my concern is that op might be jumping a bit too far ahead. instead of worrying about which framework to use, he should probably brush up on his core foundation first.
imo, i'd rather have him actually learn how html, css, and (vanilla) js interact with each other before shoving frameworks down his throat. but that might just be my personal opinion.