This post contains a quick summary describing how this website is actually made.
The whole website is purely made of static assets. It is versioned via git. Hosting of static pages is provided by Vercel (previously known as Zeit).
The software running under the hood is Hugo. It allows to quickly build static websites starting from plaintext Markdown files.
From time to time I enjoy using a CMS and writing contents directly from the browser. Forestry fits perfectly in the above flow, as it directly supports Hugo and git.