The documentation was built upon Sphinx.
Run the following command in this directory to install dependencies first:
pip install -r requirements.txt
Then you can build the documentation by running:
make html
Run the following command to start a simple HTTP server:
python -m http.server -d _build/html 8000
Then you can view the documentation in your browser at http://localhost:8000
(the port can be customized by changing the port number).