anchor.diff:      chmod a+x /opt/start-notebook-spark.sh && \
       chmod a+x /opt/start-notebook-k8s.sh && \
       chmod +x /sbin/tini && \
  -    cp /sbin/tini /usr/bin/tini    
  +    cp /sbin/tini /usr/bin/tini
   
   WORKDIR /opt/spark/work-dir
   
  
positive.code:     tar -zxvf spark-${SPARK_VERSION}-bin-hadoop2.7.tgz && \
      mv spark-${SPARK_VERSION}-bin-hadoop2.7 /opt/spark && \
      rm spark-${SPARK_VERSION}-bin-hadoop2.7.tgz && \
      cp /opt/spark/kubernetes/dockerfiles/spark/entrypoint.sh /opt && \
      rm $SPARK_HOME/jars/kubernetes-client-*.jar
  
  ADD https://repo1.maven.org/maven2/io/fabric8/kubernetes-client/4.4.2/kubernetes-client-4.4.2.jar $SPARK_HOME/jars
  ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /sbin/tini
  
  # stage.2 analytics-zoo
  
negative.code: ARG SPARK_VERSION=3.1.2
  ARG SPARK_HOME=/opt/spark
  ARG JDK_VERSION=8u192
  ARG JDK_URL=your_jdk_url
  