You'll need https://github.com/Lecrapouille/WebSiteGenerator
git clone --recursive https://github.com/Lecrapouille/MyWebSiteSrc.git
cd MyWebSiteSrc
make list
make
Replace the MyGithubPage by your website and update the websites.list file.
You can add more website projects: add them next to WebSiteGenerator and update the websites.list file.
See https://github.com/Lecrapouille/WebSiteGenerator documentation
The make command to build you website. If successful, should have created a directory build.
Then, for example, you can move generate files to your github.io directory and commit them
(in my case: https://github.com/Lecrapouille/Lecrapouille.github.io).