anchor.diff:      "deb [arch=amd64] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
       $(lsb_release -cs) stable"
   
  -ENV DOCKER_VERSION=18.06.1*
  +ENV DOCKER_VERSION=5:20.10.8*
   
   RUN apt-get update && \
       apt-get install -y --no-install-recommends docker-ce=${DOCKER_VERSION} && \
  
positive.code: ENV COSIGN_VERSION=1.0.0
  RUN wget https://github.com/sigstore/cosign/releases/download/v${COSIGN_VERSION}/cosign-linux-amd64 -O /usr/local/bin/cosign &&\
      chmod +x /usr/local/bin/cosign
  
negative.code:     && apt-get clean
  
  # Install gcloud
  ENV CLOUD_SDK_VERSION=358.0.0
  ENV PATH=/google-cloud-sdk/bin:/workspace:${PATH} \
      CLOUDSDK_CORE_DISABLE_PROMPTS=1
  
  