Description of htmldoc

HTMLDOC converts HTML and Markdown source files or web pages to EPUB, PostScript, or PDF files
with an optional table of contents.
While it currently does not support many things in “the modern web” such as
Cascading Style Sheets (CSS), forms, full Unicode, and Emoji characters,
it is still useful for converting HTML documentation, invoices, and reports.
It provides a convenient GUI and can be integrated with many continuous integration
and web server solutions.