Ask HN: Companies of one, what is your tech stack?

Hello dear HNers.

Each year for the last two years I have asked companies of one, meaning companies that consists of only one person of what tech stacks you use. Feel free to link to your site or project for show case if you want.

Here is the last two threads:

(2020) https://news.ycombinator.com/item?id=25465582

(2019) https://news.ycombinator.com/item?id=21024041

What is your tech stack?

Why did you choose it?

Do you think your choices had any impact on your success?

Thanks in advance!