https://github.com/darktable-org/dtdocs

https://standardebooks.org/contribute/producing-an-ebook-step-by-step

https://github.com/sunxen/EpubPressX

https://github.com/gohugoio/hugo/issues/6332

https://github.com/jgazeau/website2pdf

https://print-css.com/

https://print-css.rocks/

https://voussoir.net/writing/css_for_printing

https://github.com/weitblick/epub

https://discourse.gohugo.io/t/generate-hugo-website-as-e-book-epub/29559