The status page is static, in that there is no server-side rendering/processing other than just serving static files. You need only host the resources for the status page, but the files with the check results are typically stored somewhere else like S3. The status page downloads those check files with JavaScript and renders the results client-side. Hope that answers your question!
* You launch the checkup command manually or every X minutes
* Each run stores a report inside a file
* The caddy server serves the same resource to the browser...
* ... that fetches the last Y reports and computes a dashboard to be displayed
The 2 last steps seem not static to me. Is it how checkup works, or is the dashboard display part a bit different ?
Regardless of that, this is something that is going to be extremely useful to me. Thanks a lot for for it !