This page is being served via your brand-new Caddy web server. To replace it, follow the steps below.
The default site root is at /var/www/html. Drop your own index.html in there to take this place.
Create a DNS A record from your domain to the public IP of this server. Caddy will request an HTTPS certificate automatically on the first matching request.
/etc/caddy/Caddyfile in your editor of choice.:80 block with a domain name and a route.sudo systemctl reload caddy.Visit your domain in a browser. If you still see this page, double-check the DNS record has propagated and the Caddyfile lists the same hostname.
srv-01.example.net