$ npm install -g exp

  {

   "expo": {

    "name": "Your App Name",

    "icon": "./path/to/your/app-icon.png",

    "version": "1.0.0",

    "slug": "your-app-slug",

    "sdkVersion": "17.0.0",

    "ios": {

      "bundleIdentifier": "com.yourcompany.yourappname"

    },

    "android": {

      "package": "com.yourcompany.yourappname"

    }

   }

 }

 $ exp start

 $ exp build:android

 [exp] No currently active or previous builds for this project.

 Would you like to upload a keystore or have us generate one for you?

 If you don't know what this means, let us handle it! :)

  1) Let Expo handle the process!

  2) I want to upload my own keystore!

 $ exp build:status