I just came across an app today that you can use to make your localhost sever temporarily public!
-- it's a free tool that "exposes local servers behind NATs and firewalls to the public internet over secure tunnels".
No install required, just run their command-line app (for example, for a password protected url, run the command ngrok http -auth "user:password" 80) with your own user & password, and then go to the random url (eg. 1L8H66YAS.ngrok.io) that they provide you in order to access your site remotely .
James Riley .: EventBooking user since 2014 :.
.: grfx & web design / IT / AV @ St. Therese Institute of Faith and Mission, Bruno, SK, Canada :.