Since original host is down right now, this is alternative way to work around. (http://serverless.social) For details, please check https://github.com/localtunnel/localtunnel/issues/344
Below script example is based on my local url "brokerlink.dv" and port is 80
lt -h "http://serverless.social" -p 80 --subdomain brokerlink --local-host brokerlink.dv