I had a look on the following official document of Ionic
http://docs.ionic.io/docs/io-config
First it didn't work (when I run the command to add a new key it always finish with the same error "Unauthorized configuration value") and then, the document doesn't describe how to get/find the values in my angular controllers (should I use $ionicCoreSettings?).
It would be for me really useful to have a configuration file where I could put my variables, specially the url of my backend, since this one during the development period doesn't have a fixed IP.
Any idea or best practice to suggest about storing and resolving such variables?