$ npm install
$ exp start
then, in new terminal tab
$ exp ios --offline
https://facebook.github.io/react-native/
https://docs.expo.io/versions/latest/
https://oblador.github.io/react-native-vector-icons/
https://material.io/tools/theme-editor/
$ npm install --save firebase@4.6.2
$ npm install -g firebase-tools
$ npm install react-native-vector-icons --save
$ npm install --save react-native-elements
$ npm install --save react-navigation
$ npm install --save-dev eslint babel-eslint eslint-config-airbnb
$ npm install --save-dev eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react
$ touch .eslintrc.json