content: FROM dart:beta
  
  # We install unzip and remove the apt-index again to keep the
  # docker image diff small.
  RUN apt-get update && \
    apt-get install -y unzip && \
    rm -rf /var/lib/apt/lists/*
  
  WORKDIR /app
  RUN groupadd --system dart && \
    useradd --no-log-init --system --home /home/dart --create-home -g dart dart
  RUN chown dart:dart /app
  
  # Work around https://github.com/dart-lang/sdk/issues/47093
  RUN find /usr/lib/dart -type d -exec chmod 755 {} \;
  
  # Switch to a new, non-root user to use the flutter tool.
  # The Flutter tool won't perform its actions when run as root.
  USER dart
  
  COPY --chown=dart:dart tool/dart_cloud_run.sh /dart_runtime/
  RUN chmod a+x /dart_runtime/dart_cloud_run.sh
  COPY --chown=dart:dart pubspec.* /app/
  RUN dart pub get
  COPY --chown=dart:dart . /app
  RUN dart pub get --offline
  
  ENV PATH="/home/dart/.pub-cache/bin:${PATH}"
  ENV FLUTTER_CHANNEL="master"
  
  # Set the Flutter SDK up for web compilation.
  RUN dart pub run grinder setup-flutter-sdk
  
  # Build the dill file
  RUN dart pub run grinder build-storage-artifacts validate-storage-artifacts
  
  # Clear out any arguments the base images might have set and ensure we start
  # the Dart app using custom script enabling debug modes.
  CMD []
  
  ENTRYPOINT ["/dart_runtime/dart_cloud_run.sh", "--port", "${PORT}", \
    "--redis-url", "redis://10.0.0.4:6379", "--channel", "master"]
  