This website is built using Eleventy, and hosted via Vercel. It automatically deploys whenever I push changes to the public GitHub repository. (Have a look if you're interested)
When it comes to writing new content, changing the design, or adding new features, that is mostly done in Neovim. Although, I do occasionally open up VS Code.
The only automation I have set up in terms of writing content, is that I have a few scripts that create a draft post file that has some basic frontmatter. So I can pretty much just start writing straightaway.
I literally just edit text files, and then commit/push then to the repo and my site is built in around 10-20 seconds.