explain configuring a simple overlay

[dovholuknf]

see: https://openziti.discourse.group/t/is-there-a-streamlined-configuration-guide/3553

Basically it would be nice to indicate in a stepwise form what sorts of change are needed to generate/edit a config.

The doc should start with the ziti create config command and illustrate each change made and why. An associated ziti tv/video should be produced