When the host ports are entered, there really ought to be checking for host port conflicts dynamically, so that you don't need to build the image to find the conflict...

Edited May 17, 20179 yr by benyanke

Although not automatically, you do have an overview of all the used ports in the template. 

But its still possible to add a conflicting port. This should be pretty easy to do and show a warning since the list of all ports is already known.

Conflicting ports are only bad if you need to run the 2 apps simultaneously. I purposely put krusader and dolphin on the same port, so I can run either one and get whichever file manager I want using the same shortcut. I don't keep either running all the time for security reasons, just start whichever one I need on demand.

That's a good point. But I still think more often than not it would be an error esp for a new user.