Update README with basic info

README.md

-# ios-template
+# Introduction
 
-Working location for iOS template project
\ No newline at end of file
+This is a template for getting started with iOS development using GitLab and [fastlane](https://fastlane.tools/).
+
+# Reference links
+
+- [GitLab CI Documentation](https://docs.gitlab.com/ee/ci/)
+- [Blog post: Android publishing with iOS and fastlane](https://about.gitlab.com/2019/03/06/ios-publishing-with-gitlab-and-fastlane/)
+
+# Getting started
+
+You'll need a working MacOS development environment with XCode 10 to use this
+template. You can find instructions to get up and running on the Apple [XCode website](https://developer.apple.com/xcode/).
+
+If you want to use GitLab CI with your own MacOS runners (a requirement since we
+do not currently offer shared MacOS runners), please read through the blog 
+post above which will walk you through a working production configuration using
+this approach. 
+
+## What's contained in this project
+
+TBD