Find multiple open ports to listen on. It's getport for multiple ports. Calling vanilla getport in parallel will return the same open port, requiring you to utilize the port after each callback, before calling getport again, which is what getports does.
getports(3, function onPorts(error, ports) {
if (error) throw error;
server.listen(ports[0]);
server.listen(ports[1]);
server.listen(ports[2]);
});opts.start[optional] - first port to tryopts.last[optional] - last port to try
MIT