fastlane are an awesome bunch of tools. Josh Holtz has recently started Fastlane Screencast, a website with
videos/tutorials for explaining and implementing built-in fastlane tools, fastlane actions, third-party fastlane plugins, continuous integration, and anything else that fastlane can possibly do.
The first video covers integrating fastlane into your Ionic Framework build process:
A second tutorial – covering dotenv and environment variables – is already up too 🙂