anchor.diff: -FROM python:3.7-stretch as build
  +FROM python:3.7-buster as build
   
   ENV \
     DEBIAN_FRONTEND=noninteractive \
  
positive.code:   && apt-get clean \
    && rm -rf /var/lib/apt/lists/*
  
  FROM python:3.7-slim-stretch
  
  ENV \
    DEBIAN_FRONTEND=noninteractive \
  
negative.code:   && apt-get update \
    && apt-get install -y --no-install-recommends \
      ca-certificates=20190110 \
      nmap=7.70+dfsg1-6 \
      net-tools=1.60+git20180626.aebd88e-1 \
      bluetooth=5.50-1 \
      ffmpeg=7:4.1.4-1~deb10u1 \
      iperf3=3.6-2 \
      nut-client=2.7.4-8 \
    && apt-get autoremove -y \
    && apt-get clean \
    && apt-get autoclean \
  