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Start React Native Packager

suggest change 
$ react-native start

On latest version of React Native, no need to run the packager. It will run automatically.

By default this starts the server at port 8081. To specify which port the server is on 

$ react-native start --port PORTNUMBER
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Command-line instructions:
*Command Line Instructions
*Check version installed
*Initialize and getting started with React Native project
*Upgrade existing project to latest RN version
*Logging
*Start React Native Packager
*Add android project for your app
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