The example linked is for Dan Harrin (@danharrin), one of the creators and maintainers of https://filamentphp.com. Dan and the team at Filament have been supporters and early experts on Ringer since day 1, and incidentally have just launched Filament v3 today!
You can generate your own on the site.
We're also making the code for the CV open source so that you can self-host: https://github.com/ringerhq/open_source_cv
Always happy to hear thoughts and suggestions!