Broken links in docs (Introduction -> Grow your skills)

[kpalf]

Is your documentation request related to a problem? Please describe.
Documentation as seen at 5 May 2022 has 4 broken links (404 result) on the following page:
https://thin-edge.github.io/thin-edge.io/html/001_overview.html
All 4 links in the bottom section, "Grow your skills". Each of them references a different README, but none are resolved.

[kpalf]

Same README links also broken from https://thin-edge.github.io/thin-edge.io/html/SUMMARY.html

[rina23q]

It's caused by the issue that was reported in the mdbook repository. rust-lang/mdBook#984

mdbook preprocessing,

index: Convert all chapter files named README.md into index.md. That is to say, all README.md would be rendered to an index file index.html in the rendered book.

[rina23q]

Rename all README.md in the subdirectories to better names, such as tutorials, howto-guides, etc. And fix the links.

[didier-wenzek]

The point to have these files README.md and not index.md is to be able to browse the documentation directly on github without having to build it.

[rina23q]

I confirmed #1162 fixed the broken links. Therefore, I'd like to close this issue.