Feature - Show what port GatsbyJS is running on when 8000 is already in use

[orsi]

When GatsbyJS asks:

Something is already running at port 8000

✔ Would you like to run the app at another port instead? … yes

It seems strange that it doesn't actually tell you what port it eventually started on. Sure, one could guess it's 8001, but it's not apparent.

Also, when running TWO dev servers and both 8000/8001 are taken, GatsbyJS fails: