Add 'Dockerfile'

Dockerfile

@@ -0,0 +1,24 @@
+FROM reactnativecommunity/react-native-android:2.1
+# set locale to utf8 for fastlane
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+# install bundler
+RUN gem install bundler
+
+
+all: build
+VERSION = 2.1
+
+
+build:
+  docker build --tag itporbit/react-native-android:${VERSION} .
+
+
+push: build
+  docker push itporbit/react-native-android:${VERSION}
+  git tag react-native-android/${VERSION} HEAD
+  git push --tags
+
+
+run: build
+  docker run --rm -ti itporbit/react-native-android:${VERSION}