react native image fit container
<Image style={{ alignSelf: 'center', height: 150, width: 150, borderWidth: 1, borderRadius: 75 }} source={{uri:'https://facebook.github.io/react/img/logo_og.png'}} resizeMode="stretch" /> // source: https://medium.com/the-react-native-log/tips-for-react-native-images-or-saying-goodbye-to-trial-and-error-b2baaf0a1a4d