I wish the readme explained what this project actually was instead of the incredibly vague and unhelpful "self host the entire planet".
As is very common with projects on Github. They should have a paragraph at the start explaining simply what they do.
It might seem inconsequential, but maintainers often deal with a lot of angry entitled users and it could be helpful to stay away from language that implies that the people giving away their code for free (and for fun) have any obligation to provide anyone anything.
The problem with the whole OSM ecosystem is that it expects a lot of domain knowledge of technologies, formats, tools, their relations and features, limitations, that is rarely explained well, or explanaitions are often terribly outdated. Feels much like the JavaScript Frontend frameworks for an outsider, it is a lot of effort to get to an overview and understanding, despite the concepts are not new.
Perhaps in a few years, as the project picks up uses and contributors, it will get its own website and support network and be easy to understand and use by "anyone."
It is more like a sample of cool stuff you can do.
Because I understood about “the whole planet” in the context of OSM.