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Hugo...
Hugo is a static site templating builder used here. It works well. It seems similar to how github pages works, but is written in go instead of ruby. It does take a little while to scan the documentation and setup, as some of the more complex themes don’t work with some integration solutions such as CloudFlare. Simple truths such as a theme being a fallback site make sense, as after some time migrating the templating to the theme and just using the site layouts for overrides just makes sense.