Reflect web01 in the machines table and monitoring scrape list, note Grafana is
now also published publicly via web01's reverse proxy, add the CNX Uptime
dashboard, and document the dedicated acme_mx1/acme_web01 DNS-01 keys.
Explain that key material is auto-managed in the KASP keystore under
/var/lib/knot, and that the registrar DS is generated per zone with
`sudo -u knot keymgr <zone> ds`.
Docs live in docs/ (DNS, ZeroTier mesh, monitoring), built at Nix-build time and
served as static files over the ZeroTier mesh on control:8080. Commit-to-edit:
change the markdown and redeploy to publish.
Berwn