nginx.conf

server {
    listen 443 ssl;
    server_name _;

    ssl_certificate      cert.pem;
    ssl_certificate_key  cert.key;

    location / {
        proxy_pass http://xxxxxx;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}