added basic CI script

ios/ci_scripts/ci_post_clone.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+echo "Xcode version:"
+xcodebuild -version
+echo "Brew version:"
+brew --version
+echo "PATH:"
+echo $PATH
+
+# Install CocoaPods and npm using Homebrew.
+echo "Install CocoaPods"
+export HOMEBREW_NO_INSTALL_CLEANUP=TRUE
+brew install cocoapods
+echo "Install npm"
+brew install npm
+echo "Install gettext for envsubst command"
+brew reinstall gettext
+
+echo "Pod version:"
+pod --version
+echo "Node version:"
+node --version
+echo "NPM version:"
+npm --version
+echo "PATH:"
+echo $PATH
+
+# Setting Environment Variables
+cd ../..
+/usr/local/opt/gettext/bin/envsubst < .env.deploy > .env.staging
+cp .env.staging .env
+
+# Install dependencies
+echo "Running npm install"
+npm install
+echo "Running pod install"
+pod install