After several years and multiple attempts, I finally have a website again.
I tried quite a few static website generators, including starting my own, until I finally settled with the recently announced Lektor.
The main addition to Lektor is my reStructuredText plugin lektor-rst. I had all the old content in rst already and I favour it over markdown.
The source code for my website is available on GitHub at https://github.com/fschulze/florian-schulze.