The web host refuses every connection on port 80, taking the site down for visitors routed to it.
A configuration rollout pushed a new site file to the web tier at 08:50, and the host has refused HTTP connections ever since.
The rollout tool reported success.
nginx is not running, and the first theory is that the new build of the rollout tool killed it mid-copy.
The fix is yours to find: hints, the recovery checks and the debrief unlock inside the incident.
The alert fires and the clock starts. Read the page and the briefing.
Work in a simulated shell with realistic output: logs, configs, services.
Change the system the way you would in production. Hints are there if you get stuck.
Automated checks verify the recovery, then the debrief explains what happened.
Free, instant, and it works on your phone. No signup: start as a guest and save your progress later.