anchor.diff:  
   RUN docker-php-ext-install mysqli pdo_mysql zip \
     # allow for image uploads inside container
  -  && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
  +  && docker-php-ext-configure gd \
  +    --with-jpeg \
  +    --with-freetype \
     && docker-php-ext-install gd
   
   # install Mailhog's mhsendmail
  
positive.code: FROM php:7.2.7-fpm-alpine3.7
  
  # set the APK repos explicitly because dl-cdn.alpinelinux.org is unreliable
  # TODO: evaluate if https://github.com/gliderlabs/docker-alpine/issues/386#issuecomment-437698540
  # fixes the issue
  RUN echo "https://uk.alpinelinux.org/alpine/v3.7/main" > /etc/apk/repositories \
    && echo "https://uk.alpinelinux.org/alpine/v3.7/community" >> /etc/apk/repositories
  
  RUN apk update; apk upgrade; apk add \
    freetype-dev \
    libjpeg-turbo-dev \
    libpng-dev \
    msmtp \
    zziplib-utils
  
  
negative.code:   && docker-php-ext-enable xdebug \
    # Clean up
    && apk del .phpize-deps
  
  