Great; we now have the team's project running smoothly on our computer, and we are ready to start contributing code. Realizing that our team's workflow isn't exactly efficient, we are going to take some initiative and introduce fastlane. In order to convince the rest of the team that this tool will change their world, we are going to first set it up over our forked project and demonstrate rather than theorize.
To initialize fastlane, in your project folder, simply type in the following:
fastlane init
The prompt will ask you for your Apple ID so that you can hook into iTunes Connect seamlessly through the command line. After you've gone through all the prompt questions, fastlane will create a fastlane directory and fetch all of your app metadata from iTunes Connect.