expose localhost to internet code example

Example 1: access localhost from the internet

There are couple of good free service that let you do the same. Ideal for 
showing something quickly for testing:

	1. http://localtunnel.me/
	2. https://ngrok.com/
	3. http://localhost.run/

Edits:
	add ngrok service
	add localhost.run service

Example 2: make localhost available online

ssh -R 80:localhost:8080 ssh.localhost.run