Dead links in docs sidebar navigation

[drakedevel]

On https://www.kube-router.io/docs/, the sidebar links for "Introduction", "User Guide", and "Development" are broken (404).

The issue seems to be that these entries have invalid absolute links to /introduction, /user-guide, and /developing (there should be a /docs prefix). The other entries appear to be using relative links and so don't suffer from this issue.

This sidebar is generated from mkdocs.yml, which is why I filed this issue in this repository and not the repository that has the rest of the docs. As far as I can tell, this is a bug in the version of mkdocs that was used. I tried upgrading to mkdocs==1.0.2 and mkdocs-rtd-dropdown==1.0.2 and confirmed that the sidebar links were fixed with no other changes, although the upgrade introduced some visual glitches that I didn't have a chance to debug.