anchor.diff:  COPY ci/docker_linux/Gemfile /Gemfile
   COPY ci/docker_linux/Gemfile.lock /Gemfile.lock
   
  +# Install dependencies for desktop flutter run
  +RUN apt-get install -y --no-install-recommends \
  +  clang \
  +  cmake \
  +  libgtk-3-dev \
  +  ninja-build \
  +  pkg-config && \
  +  apt-get upgrade -y --no-install-recommends && \
  +  apt-get clean
  +
   RUN bundle config set system 'true' && \
     bundle install --system
  
positive.code:     gcloud config set core/disable_usage_reporting true && \
      gcloud config set component_manager/disable_update_check true
  
  # Add nodejs repository to apt sources and install it.
  ENV NODEJS_INSTALL="/opt/nodejs_install"
  RUN mkdir -p "${NODEJS_INSTALL}"
  RUN wget -q https://deb.nodesource.com/setup_10.x -O "${NODEJS_INSTALL}/nodejs_install.sh"
  RUN bash "${NODEJS_INSTALL}/nodejs_install.sh"
  
  # Install the rest of the dependencies.
  RUN apt-get install -y --no-install-recommends \
    locales \
    gcc \
    ruby \
    ruby-dev \
    nodejs \
    lib32stdc++6 \
    libstdc++6 \
    libglu1-mesa \
    build-essential \
    default-jdk-headless \
    google-chrome-stable
  
  # Install the Android SDK Dependency.
  ENV ANDROID_SDK_URL="https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip"
  
negative.code: # for performing pushes to production, and so this image is quite a bit larger
  # than strictly needed for just building Flutter apps.
  
  # Last manual update 2021-09-01 (changing this comment will re-build image)
  
  FROM debian:bullseye
  MAINTAINER Flutter Developers <flutter-dev@googlegroups.com>
  
  RUN apt-get update -y && \
    apt-get upgrade -y
  
  # Install basics
  RUN apt-get install -y --no-install-recommends \
  