nginx_as_vonage_ip_proxy

location /proxy/ {
                if ($request_method = OPTIONS ) {
                        add_header Allow "POST, GET, OPTIONS";
                        add_header Access-Control-Allow-Headers "*";
                        add_header Access-Control-Allow-Origin "*";
                        return 200;
                }
                resolver 8.8.8.8 ipv6=off;
                rewrite /proxy/(?:https?:\/\/)?(?:[^@\/\n]+@)?(?:www\.)?([^\/?\n]+)(.+) $2 break;

                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $1;
                proxy_set_header X-NginX-Proxy true;
                proxy_pass https://$1;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "Upgrade";
                proxy_ssl_server_name on;
}