请教一下如何使用caddy反代

[Joyace]

http://xxxx {
 redir https://i.joyace.xyz{url}
}
xxxx {
 gzip
 tls [email protected]
 proxy / https://xxxxxxxxx {
    header_upstream Host {host}
    header_upstream X-Real-IP {remote}
    header_upstream X-Forwarded-Proto {scheme}
 }
}

像这样配置之后访问页面出错:

421 Site i.joyace.xyz is not served on this interface

[sam8877]

xxx  {
        root  /data/imgurl
        gzip
        fastcgi  /  /run/php/php7.3-fpm.sock php {
                ext  .php
                split  .php
                index  index.php
        }
        rewrite {
                to {path} {path}/ /index.php?/{uri}
        }
}