anchor.diff:  FROM alpine:edge
   
  -RUN echo 'http://dl-4.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
  +RUN set -xe \
  +    echo 'http://dl-4.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
       && apk update \
       && apk add --no-cache --update \
       bash \
  
positive.code:     php7-json \
      php7-zlib \
      php7-xml \
      php7-pdo \
      php7-phar \
      php7-openssl \
  
negative.code:     php7-xmlreader \
      php7-gettext \
      php7-tokenizer \
      php7-zip \
      openssh-client \
      git \
      curl \
  