Has anyone used DuckDB (or anything else) to create an open source way to publish a mailbox so that a regular person can browse it and search it?

I'm aware of jmail.world, but they haven't (yet?) published the source code.

I had Claude hack something together recently: https://healdsburg-youcubed-emails.vercel.app/

It works fine for this small set of emails, although the search isn't great, and there was more preprocessing that I would have liked. (I would prefer to be able to point a single binary at a pst or mbox file, and have it magically serve it like this, even if it means I need a VPS to serve it.)