Positive control for HackerOne report #4016696.

This hostname belongs to the researcher (jakubk) and was pointed at Vercel on
purpose, to demonstrate what a successful custom-domain claim looks like when a
hostname genuinely is unclaimed: Vercel attached it with no ownership challenge,
issued a certificate, and began serving this project within seconds.

It exists only as a control. The hostname actually reported (defence.grab.com)
could NOT be claimed this way - Vercel demanded a TXT ownership proof inside the
target's own DNS zone.

See /@jakubk.html . No data is collected, stored or logged here. Static text only.
This host will be removed on request.