server {
    listen      <your ip>:80;
    server_name your.site.com;
    return 301 https://$server_name$request_uri;
}

server {
    listen   <your ip>:443 ssl;
    server_name your.site.com;

    ……..

    location / {
        proxy_pass      http://127.0.0.1:6081/;

        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 https;
        proxy_set_header    X-Forwarded-Port  443;
    }
}