anchor.diff:  ENV ES_HOME /opt/elasticsearch
   
   RUN set -ex \
  - && mkdir ${ES_HOME} \
  + && mkdir -p ${ES_HOME} \
    && addgroup --gid 1100 elk \
    && adduser --disabled-password --disabled-login --gecos '' --uid 1100 --gid 1100 elk \
    && curl -L -O https://download.elastic.co/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/${ES_VERSION}/elasticsearch-${ES_VERSION}.tar.gz \
  
positive.code: ENV LOGSTASH_HOME /opt/logstash
  
  RUN set -ex \
   && mkdir ${LOGSTASH_HOME} \
   && curl -L -O https://download.elastic.co/logstash/logstash/logstash-${LOGSTASH_VERSION}.tar.gz \
   && tar xzf logstash-${LOGSTASH_VERSION}.tar.gz -C ${LOGSTASH_HOME} --strip-components=1 \
   && rm -f logstash-${LOGSTASH_VERSION}.tar.gz \
  
negative.code: ENV KIBANA_HOME /opt/kibana
  
  RUN set -ex \
   && mkdir -p ${KIBANA_HOME} \
   && curl -L -O https://download.elastic.co/kibana/kibana/kibana-${KIBANA_VERSION}-linux-x86_64.tar.gz \
   && tar xzf kibana-${KIBANA_VERSION}-linux-x86_64.tar.gz -C ${KIBANA_HOME} --strip-components=1 \
   && rm -f kibana-${KIBANA_VERSION}-linux-x86_64.tar.gz \
  