This website is created with Astro. What is Astro? From their website:
Astro is an all-in-one web framework for building fast, content-focused websites.
What I like about Astro is the fact that markdown works out-of-the-box including code highlighting with Shiki! Install the tailwind plugin and you already have all the ingredients for a decent-looking (hopefully…) and well-functioning blog. As a bonus: you can use any frontend framework you like, such as React, Svelte or Vue. You can even use them all at once. So you could have one component written in Svelte and another using React. Pretty cool!