The source markdown documents were also edited using Mark Text (http://github.com/marktext/) which is a good offline markdown document reader and also exports to PDF or HTML formats
Material for MkDocs static site generator and theme was used to build the website
The tables were edited in Libreoffice Calc using a custom html template, then copied and pasted into the text
Figures were edited using Libreoffice Drawn and exported as SVG. In trial-and-error testing, what looks best on the laptop monitor and smartphone screen are approximately 7 x 3 inch figures with font size 10 or 12
The original documents were converted from html to markdown using pandoc
PDF files were converted to TXT using pdftotext (poppler-utils)
The moving directory contains the original files that were converted to markdown