anchor.diff:  # Base OS
   #############
   
  -FROM ubuntu:bionic as base_os_context
  -
  -ENV DOCKER_VERSION=5:20.10.6~3-0~ubuntu-bionic
  +FROM ubuntu:focal as base_os_context
  +
  +ENV DEBIAN_FRONTEND=noninteractive
  +
  +ENV DOCKER_VERSION=5:20.10.6~3-0~ubuntu-focal
   ENV CONTAINERD_VERSION=1.4.3-1
   
   ENV OUTDIR=/out
  
positive.code: # Docker including docker-ce, docker-ce-cli, and containerd.io
  ADD https://download.docker.com/linux/ubuntu/gpg /tmp/docker-key
  RUN apt-key add /tmp/docker-key
  RUN add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"
  RUN apt-get update
  RUN apt-get -y install --no-install-recommends docker-ce="${DOCKER_VERSION}" docker-ce-cli="${DOCKER_VERSION}" containerd.io="${CONTAINERD_VERSION}"
  
  
negative.code: # Nodejs
  #############
  
  FROM ubuntu:focal as nodejs_tools_context
  
  # Pinned versions of stuff we pull in
  ENV BABEL_CLI_VERSION=v7.7.4
  