server {

        listen YOURPORT;

        server_name YOURHOSTNAMEORIPADDRESS;

        auth_basic "Restricted Access";
	auth_basic_user_file /etc/nginx/htpasswd.users;

        location / {
            proxy_pass http://localhost:5601;
	    proxy_http_version 1.1;
	    proxy_set_header Upgrade $http_upgrade;
	    proxy_set_header Connection 'upgrade';
	    proxy_set_header Host $host;
	    proxy_cache_bypass $http_upgrade;

        }

    }
