Content for static GitHub pages at https://riege.github.io. The content is maintained in (private) repository riege.github.io on GitHub.
Private repositories of riege might even have (own) public GitHub pages, which will be accessible via generic URLs.
Example: https://riege.github.io/playground-mskopp for repository playground-mskopp
There are various formats and even themes available to generate content to GitHub pages. This page here is based on Markdown, showing the README.md resource.
Follow the Getting started with GitHub Pages documentation.
Note that building or pages and deployment to riege.github.io is triggered by a GitHub action which requires a few minutes to updated and redeploy upon a commit/change.