anchor.diff:      apt-get update && \
       apt-get install --yes --allow-unauthenticated portal && \
       apt-get clean && \
  -    rm --force --recursive --verbose /tmp/artifacts
  +    rm --force --recursive --verbose "${ARTIFACT_DIR}"
   
   ENV \
       RUN_USER="${RUN_USER:-www-data}" \
  
positive.code: 
  ARG debian_repo="https://uwcirg.jfrog.io/uwcirg/portal-deb"
  
  COPY debian/artifacts /tmp/artifacts
  
  # Only add local repository if packages available in artifacts/
  RUN \
      if [ -n "$(ls /tmp/artifacts)" ]; then \
          echo deb file:/tmp/artifacts ./ > /etc/apt/sources.list.d/truenth.local.list; \
      else \
          echo deb "${debian_repo}" stable main > /etc/apt/sources.list.d/truenth.list; \
      fi
  
negative.code: FROM debian:stretch
  
  ENV \
      ARTIFACT_DIR="${ARTIFACT_DIR:-/tmp/artifacts}" \
      DEBIAN_FRONTEND="noninteractive"
  
  RUN \
  