anchor.diff:      php7-redis \
       php7-pdo \
       php7-pdo_mysql \
  +    icu-dev \
       php7-intl \
       php7-phar \
       php7-opcache \
  
positive.code:     nginx \
      ca-certificates \
      mysql \
      mysql-client && \
      pip install supervisor
  
  # 添加配置文件
  RUN mkdir -p /etc/redis
  
negative.code:     apk update && \
      apk upgrade
  
  
  # 安装 bash, Supervisor, php7-fpm, redis, mongodb, nginx, mysql
  RUN apk add --no-cache -u  bash \
      php7 \
      php7-common \
      php7-fpm \
  