The published website is avilable at https://siv3d.github.io/

Install the mkdocs, mkdocs-material, and fontawesome_markdown packages using pip:

pip install mkdocs
pip install mkdocs-material
pip install fontawesome_markdown

In the directory where mkdocs.yml file resides, build the documentation:

mkdocs build

This will create a new directory, named siv3d.github.io.