This is not new, it's been in Caddy for over 4 years. Caddy is very modular by design, so anyone can write plugins to augment its capabilities. The "templates"

This is not new, it's been in Caddy for over 4 years. Caddy is very modular by design, so anyone can write plugins to augment its capabilities. The "templates" directive is in the standard distribution, because it's simple and generally useful.