anchor.diff:  # Image metadata and config
  -FROM debian:stretch
  +FROM debian:buster
   
   LABEL name="angular.io PR preview" \
         description="This image implements the PR preview functionality for angular.io." \
  
positive.code: 
  # Set up the Node.js scripts
  COPY scripts-js/ $AIO_SCRIPTS_JS_DIR/
  WORKDIR $AIO_SCRIPTS_JS_DIR/
  RUN yarn install --production --frozen-lockfile
  
  
  # Set up health check
  
negative.code: 
  
  # Add extra package sources
  RUN apt-get update -y && apt-get install -y curl=7.64.0-4+deb10u1
  RUN curl --silent --show-error --location https://deb.nodesource.com/setup_12.x | bash -
  RUN curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
  RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
  
  
  # Install packages
  RUN apt-get update -y && apt-get install -y \
      cron=3.0pl1-134+deb10u1 \
      dnsmasq=2.80-1 \
      nano=3.2-3 \
      nginx=1.14.2-2+deb10u1 \
      nodejs=12.16.2-1nodesource1 \
      openssl=1.1.1d-0+deb10u3 \
      rsyslog=8.1901.0-1 \
      vim=2:8.1.0875-5 \
      yarn=1.22.4-1
  RUN yarn global add pm2@4.4.0
  
  
  # Set up log rotation
  