anchor.diff:        /var/tmp/* \
         /usr/share/man/?? \
         /usr/share/man/??_* \
  -
     # Install composer
     && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     # Show versions
  
positive.code:       rsync \
        git \
        yarn \
  
  
    # Slim down image
    && apt-get clean \
    && rm -rf \
  
negative.code: FROM php:7
  MAINTAINER Carlos A. Gomes <carlos.algms@gmail.com>
  
  RUN apt-get update \
    && apt-get install --no-install-recommends --no-install-suggests -y \
        gnupg2 \
        apt-transport-https \
    && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
    && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
  