Good catch ioannis!
>Fortunately, it's been captured in the Wayback Machine.
Great! If we manage to rescue the images and update the README, that'd be great!
>One has to wonder why the content was not internal to the repo and instead published/hosted externally.
In Jenkins, plug-ins used to store all of their docs in an instance of Confluence. Then came jenkins.io, then migration off of Confluence and everything went to GitHub pages. Most plug-ins updated (as we did). However, the tool that exported the old Wiki pages, generated a Markdown with links to images in Confluence I think?
Hence the confusion now. The Confluence instance, or whichever machine that was hosting the images, has been decommissioned I think. Sorry.
Bruno
Fortunately, it's been captured in the Wayback Machine. One has to wonder why the content was not internal to the repo and instead published/hosted externally.