Hacker News Reader

Looks cool!

To add a alternative: Docsify

It's not optimized for notes(tags are missing), but it does offer a large amount of community addons: https://docsify.js.org/#/awesome

This reminds me a bit of mdwiki http://dynalon.github.io/mdwiki/#!index.md which was just an index.html in a folder of markdown files.