This is a stub website built using Lektor.

Lektor creates fully static websites that can be updated by a running the CMS infrastructure locally, using a VCS-able format, then compiling the result into fully-formed HTML files that can be served publicly with minimal security exposure.

It's served using a bunch of AWS products, that I am going to list now for the sake of testing formatting.

CloudFront: provides https and edge caching
S3: stores the compiled files
CodeBuild: continuous delivery
CodeCommit: private git

For grander projects, I would point to Webpack (which can be incorporated into the Lektor builder) and Angular, but I'm sure there are plenty of similarly interesting options.