Initiatives like this that makes creating web pages more direct are great!
I've done something similar using IPFS for persistence [1]. The format is different - it's a tutorial starting out with the dev tools that guides you to build an editor + site.
I wish that IPFS was more usable and mature as a general web technology! I've considered trying this with Git as the backend, but I haven't done much research into what the tradeoffs or complications would be?
[1] - https://www.thebacklog.net/projects/agregore-web-apps/