added setup steps to readme

README.md

@@ -1,10 +1,19 @@
 # Get me high mobile
 
+## Setup
+
+```bash
+[sudo] npm i react-native -g
+npm i
+```
+
 ## Running
 To run your app on iOS:
    Open <project foler>/ios/getMeHighMobile.xcodeproj in Xcode
    Hit the Run button
 To run your app on Android:
    Have an Android emulator running (quickest way to get started), or a device connected
+   ```bash
    cd <project foler>/getMeHighMobile
    react-native run-android
+   ```