WOPI documentation for PS resources

This ticket was created based on Feedback received from Bermuda Monetary Authority that is an existing client.

If PS resources are going to make any customization (and clients often demand so) we should be able to have a full fledged addon running on a local laptop

So please describe how PS or client side developers could enable WOPI on the local laptop to work the same way it works in production.

Might be issue with me testing it and I am not the smartest person around here but as much as I tried I was not able to setup WOPI on local laptop. It shows icons and even triggers connection to O365 but connection always ends up showing error page.

It seems that microsoft office online needs a callback URL that it will call to get document REST services. What is not possible to give us my laptop is not known to world DNS services.

Is this even possible to work on this addon from a local laptop ? How to test it otherwise ?