Warning in WebUI if the pre-open port and the app port of the image overlap

[hoyajigi]

Main idea

If you set pre-open port that is overlapping with the image's app's port (or 2000, 2001), You got Assertion error and session creation fail. So you should prehibit or warn that you cannot use those ports as pre-open port.

Example of those ports

2000, 2001: backend.ai reserved ipython:3000,jupyter:8091,jupyterlab:8090,vscode:8180,tensorboard:6006,mlflow-ui:5000,nniboard:8080

Alternative ideas

No response

Anything else?

No response

[adrysn]

Another port which cannot be used as a pre-open port: 2200.