Android Docker Image for react native (Experimental)
Motivation
This is an implementation of https://github.com/react-native-community/discussions-and-proposals/blob/master/proposals/0003-Official-Docker.md.
Dockerhub Image
see https://hub.docker.com/r/reactnativecommunity/react-native-android/
Name may change later, see react-native-community#7.
Original version is split from react-native repo, see https://github.com/facebook/react-native/blob/master/ContainerShip/Dockerfile.android-base.