Added react-native run-ios in Getting Started (#918)
Added react-native run-ios in Getting Started (#918)


kunall17/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,nashvail/zulip-mobile,nashvail/zulip-mobile,kunall17/zulip-mobile,kunall17/zulip-mobile,kunall17/zulip-mobile,nashvail/zulip-mobile,nashvail/zulip-mobile,vishwesh3/zulip-mobile