Published at https://matkoniecz.github.io/dead_links_testing_site/
To be used in testing of dead link detector script(s)
Recommended tool: htmlproofer
git clone https://github.com/matkoniecz/dead_links_testing_site
cd dead_links_testing_site
htmlproofer . --assume-extension --check-html --check-favicon --log-level warn
See also other tools I considered