How to change Caddy configuration

1. Backup:

   sudo cp /etc/caddy/Caddyfile /etc/caddy/Caddyfile.bak-$(date -u +%Y%m%dT%H%M%SZ)

2. Edit: sudoedit /etc/caddy/Caddyfile
3. Validate: sudo caddy validate --config /etc/caddy/Caddyfile
4. Reload: sudo systemctl reload caddy
5. Verify affected and control domains:

   curl -sI https://<changed-host> | head -8
   curl -sI https://cloud.cadenceworks.tech | head -3

Nested braces (e.g. basicauth { }) break naive brace-stripping edits — edit carefully.

Reference: Caddy.