The documentation seems very minimal. Also, the link in the readme doesn't seem to work.
In comparison, here is the extensive documentation of graphql-dotnet:
https://graphql-dotnet.github.io/docs/getting-started/introduction
The source of the documentation is MIT licensed, so we can use that and modify it to get a similar doc site.
https://github.com/graphql-dotnet/graphql-dotnet/tree/master/docs2