假设VPS IP为44.55.66.77，域名为mydomain.com，VPS系统为debian 9
VPS上make install安装了nginx，nginx version为1.15.1，nginx运行在80端口，一开始nginx.conf是这样,

...
http {
    server {
        listen 80;
        server_name mydomain.com;
        location / {
            root html;
            index index.html index.htm;
        }
    }
}
...

现在想通过nginx代理其他端口实现二级域名的效果，比如more.mydomain.com指向8090端口，配置是这样，

server {
    listen 80;
    server_name more.mydomain.com;
    location / {
        proxy_pass http://127.0.0.1:8090;
        proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        root /usr/local/nginx/html;
        index index.html index.htm;
    }
}

nginx reload后访问more.mydomain.com提示找不到服务器 IP 地址。
这种写法有问题吗？另外nginx添加ssl模块后如何代理?

#nginx.conf
server {
    listen 80;
    server_name mydomain.com;
    
    return 301 https://$host$request_uri;
}