server {
    server_name congyu.org;
    server_name cn.congyu.org;
    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.nginx-debian.html;

    location / {
        try_files $uri $uri/ =404;
    }

    listen [::]:443 ssl ipv6only=on;
    listen 443 ssl;
    ssl_certificate /etc/letsencrypt/live/congyu.org/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/congyu.org/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
}

server {
    if ($host = congyu.org) {
        return 301 https://$host$request_uri;
    }

    listen 80;
    listen [::]:80;

    server_name congyu.org;
    return 404;
}

server {
    if ($host = cn.congyu.org) {
        return 301 https://$host$request_uri;
    }

    listen 80;
    listen [::]:80;

    server_name cn.congyu.org;
    return 404;
}