Here are the links to the documentation for versions that are still supported :
Full documentation may be found in docs folder into this repository, and may be read online without to do anything else.
As alternative, you may generate a professional static site with Material for MkDocs.
Configuration file mkdocs.yml is available and if you have Docker support,
the documentation site can be simply build with following command:
docker run --rm -it -u "$(id -u):$(id -g)" -v ${PWD}:/docs squidfunk/mkdocs-material build --verbose