anchor.diff:  
   ENV RACK_ENV production
   
  -RUN apt-get update \
  -    && apt-get install -y --no-install-recommends \
  -        imagemagick \
  -    && rm -rf /var/lib/apt/lists/*
  +RUN apk add --no-cache imagemagick
   
   COPY --from=Build /usr/local/bundle /usr/local/bundle
   COPY --from=Build /usr/src/app /usr/src/app
  
positive.code: FROM ruby:2.7.2-slim-buster as Ruby
  
  ##################################################
  # Build Stage
  
negative.code: 
  ENV RACK_ENV production
  
  RUN apk add --no-cache \
          g++ \
          make \
      && bundle config --global frozen true \
      && bundle config --global without "development test"
  
  WORKDIR /usr/src/app
  
  