Automated TLS on Raw IP Addresses with FrankenPHP

Traditionally, obtaining automated Let's Encrypt TLS certificates required a fully qualified domain name (FQDN). With recent ACME protocol updates and FrankenPHP's integrated Caddy web server, obtaining HTTPS certificates directly on public IP addresses is now straightforward.

# Caddyfile
203.0.113.45 {
    tls admin@example.com
    
    frankenphp {
        web_root /var/www/html/public
    }
}