Edit: Sorry, I just realized you meant my blog, not the TinyPilot website. My blog is just Hugo + Netlify, and the source is public.[2]
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The web tech stack is actually one of my biggest regrets. It's a static site generator called Gridsome[0] that the maintainers abandoned about three months after I used it to launch the TinyPilot website.
At the time I made the TinyPilot site, I was very excited about Vue, so a Vue-based SSG seemed great. Since then, I've come to find SPAs and most frontend frameworks to be way too much complexity, so I've moved away from Vue, but the TinyPilot website is still stuck on Vue 2.x and bootstrap-vue (which is tied to Vue 2 and Bootstrap 4).
So, it keeps creaking along, but building the 100ish pages on the site takes about five minutes, whereas I think something like Hugo could probably do it in a few seconds. Plus, we get random runtime errors[1] that are pretty hard to debug.