Great question — answering as the UphillTech team:
Based on their documentation it looks like the default is to output as HTML, but the -x makes it output as JSON to the console instead. I think if you use the normal output you can then upload that somewhere like S3 as a static site, and it should be pretty much what you're looking for. P.S. The default output folder is ./out, but you can specify a different folder if you wish using -d
Full answer by Bets: https://stackoverflow.stackexchange.com/a/79829878 (CC BY-SA 4.0).
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