anchor.diff:      && gem install bundler \
       && bundle install --retry=3 \
       && apk del --purge deps \
  -    && rm -rf /tmp/* /var/cache/apk/*
  +    && rm -rf /tmp/*
   
   COPY ./Portus .
  
positive.code: COPY /Portus/Gemfile* ./
  
  RUN set -ex \
      && apk add --update -t deps \
             gcc \
             libxslt-dev \
             libxml2-dev \
  
negative.code:            openssl-dev \
             ruby-dev \
             ruby-mini_portile \
      && apk add --no-cache \
             bash \
             ca-certificates \
             libffi \
  