MkDocs: https://www.mkdocs.org/
Theme used: Material for MkDocs
The website can be built or served locally. However, I use Netlify to build the website whenever I push new changes to this repository and serve it at https://docs.rohitfarmer.com. I followed this tutorial to set up an automatic build and serve by Netlify https://www.starfallprojects.co.uk/projects/deploy-host-docs/deploy-mkdocs-material-netlify/.
cd mk-docs
mkdocs build
cd mk-docs
mkdocs serve