location / {
    proxy_set_header Host                $host;
    proxy_set_header X-Real-IP            $remote_addr;
    proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto    $scheme;
    proxy_set_header X-Forwarded-Host    $host;
    proxy_set_header X-Forwarded-Port    $server_port;
    proxy_pass http://127.0.0.1:9000;
}