This site is handmade, with the HTML and CSS written as Go templates that are pieced together during a generation phase of a custom program.
The program is then recompiled in server mode, where the generated static site is embedded in the binary using Go's embed package. It runs an HTTP server configured for TLS with certificates signed by Lets Encrypt.
The server binary is then distributed to VMs running on multiple cloud providers.
No javascript is present, and no data is collected about visitors -- the only metrics kept are a count of each url path requested as prometheus metrics.