Integrate Fastlane CI/CD (#44)

mobile/ios/fastlane/Fastfile

@@ -0,0 +1,28 @@
+# This file contains the fastlane.tools configuration
+# You can find the documentation at https://docs.fastlane.tools
+#
+# For a list of all available actions, check out
+#
+#     https://docs.fastlane.tools/actions
+#
+# For a list of all available plugins, check out
+#
+#     https://docs.fastlane.tools/plugins/available-plugins
+#
+
+# Uncomment the line if you want fastlane to automatically update itself
+# update_fastlane
+
+default_platform(:ios)
+
+platform :ios do
+  desc "iOS deployment"
+  lane :beta do
+    build_app(scheme: "Runner",
+              workspace: "Runner.xcworkspace",
+              xcargs: "-allowProvisioningUpdates")
+    upload_to_testflight(
+      skip_waiting_for_build_processing: true
+    )
+  end
+end