rootfs/etc/caddy/snippets.caddyfile

(app-redir) {
    @redirect {
        expression `{http.request.host.labels.2} != "{args[0]}"`
    }
    redir @redirect https://{args[0]}.zio.sh{uri} temporary
}

(cors) {
    @origin header Origin {args[0]}
	header @origin Access-Control-Allow-Origin "{args[0]}"
    header @origin Access-Control-Request-Method GET
}

(homedir) {
    @user_home path_regexp user ^/~([^/]+)(/.*)?$
    handle @user_home {
        redir /~{re.user.1} /~{re.user.1}/ permanent
        root * {args[0]}{re.user.1}/www
        rewrite * {re.user.2}
        file_server browse {
            hide .[A-Za-z]*
        }
    }
}

(nobots) {
    respond /robots.txt 200 {
        body "User-agent: *
Disallow: /"
        close
    }
}

(tls-cf) {
    tls {
        dns cloudflare {args[0]}
        resolvers 1.1.1.1
    }
}