anchor.diff:  MAINTAINER Dominique HAAS <contact@dominique-haas.fr>
   
   ENV NGINX_VERSION 1.9.12
  +
   
   RUN \
     build_pkgs="build-base linux-headers openssl-dev pcre-dev wget zlib-dev" \
  
positive.code:   && adduser -D www-data
  
  # forward request and error logs to docker log collector
  RUN ln -sf /dev/stdout /var/log/nginx/access.log && \
      ln -sf /dev/stderr /var/log/nginx/error.log
  
  VOLUME ["/var/log/nginx"]
  
  
negative.code:   && mkdir -p /tmp/src \
    && cd /tmp/src \
    && wget http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz \
    && wget http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz.asc \
    && gpg --keyserver pgpkeys.mit.edu --recv-key A1C052F8 \
    && gpg --verify nginx-${NGINX_VERSION}.tar.gz.asc nginx-${NGINX_VERSION}.tar.gz \
    && tar -zxvf nginx-${NGINX_VERSION}.tar.gz \
    && cd nginx-${NGINX_VERSION} \
    && ./configure \
  