A throwaway site whose only job is to prove the v5 template changes work. If you are reading this on a pr-N hostname, the feature works end to end: every pull request gets its own subdomain, with DNS records written to Cloudflare instead of Route 53.
Before v5, using a custom domain meant delegating the whole zone to Route 53. Since anasnadaf.com is managed on Cloudflare, that was a non-starter. Compute still runs on AWS in your own account — only record management moved.
A reviewer gets pr-4.0xci.anasnadaf.com instead of an opaque d1a2b3c4.cloudfront.net. See the changelog for everything that shipped, including the parts that are still rough.