anchor.diff:      xsltproc \
       zip \
       zlib1g-dev \
  -    && apt-get clean --quiet
  +    && apt-get clean --quiet >/dev/null
   # http://stackoverflow.com/a/37604675/624706
   
   # Set the locale
  
positive.code: 
  # Update AndroidSDK
  # Get ids from sdkmanager --list
  RUN yes | sdkmanager --licenses
  RUN echo "y" | sdkmanager "build-tools;${BUILD_TOOLS_VERSION}" \
      "emulator" \
      "platform-tools" \
  
negative.code: # Add enviroment variables 
  # https://developer.android.com/studio/command-line/variables#envar
  ENV ANDROID_SDK_ROOT /opt/android-sdk-linux
  ENV ANDROID_SDK_HOME ${ANDROID_SDK_ROOT}/sdk-home
  # /tools/bin - sdkmanager, avdmanager
  # /platform-tools - adb
  # /emulator - emulator, emulator-check 
  