The solution.
gigalixir create --name app-name
This isn’t explicitly mentioned in the docs so far as I can see. And the thread of the instructions for those with an existing app to deploy branches before app naming gets mentioned.
@jesse has been very helpful. My next problem is the erlsom library, which is breaking my deployment, but that’s another problem for another day!
Edit
Apart from here! Moved — GIGALIXIR 1.4.0 documentation
But my thought process went along the lines of: I have my app, I don’t need to create another … and given the warnings about not being able to change names and things I didn’t want to experiment! However, deleting an app was painless
gigalixir scale -r 0 app-name
gigalixir delete_app app-name
