These are probably the opposite of what most people would call "Easy installation instructions" if you compare it to Gitlab's Omnibus package for example. They are well written and probably complete but not what people would call easy.
I suppose at some point I can set up a Dockerfile, but understanding each of these pieces is necessary to maintain even a Gitlab installation, and definitely to scale one (and Gitlab requires scaling much sooner than SourceHut, which is far more lightweight). Handholding is not always the right answer.