This is $2.88/day, $86.4/month, $1051.2/year. For them to do essentially nothing.
Most notably, this is the same price as their hosted "Linux 1-core" on a per-minute basis. Meaning they're charging you the same for running it yourself, as you'd pay for them to host it for you...
Don't they generally only kick in when you push or merge?
This blog post isn't really about HTML parsers, however. The JustHTML port described in this blog post was a worthwhile exercise as a demonstration on its own.
Even so, I suspect that for this particular application, it would have been more productive/valuable to port the Java codebase to TypeScript rather than using the already vibe coded JustHTML as a starting point. Most of the value of what is demonstrated by JustHTML's existence in either form comes from Stenström's initial work.