anchor.diff:  
   FROM openjdk:13-alpine AS main
   
  -# variables run stage
  -ENV VERSION 0.6.2
  +# arguments and variables run stage
  +ARG VERSION=0.6.2-SNAPSHOT
  +ENV JETTY_HOME /var/lib/jetty
  +ENV RESOURCES_PREFIX=file://${JETTY_HOME}/
  +ENV PROXY_PREFIX=
   ENV JETTY_URL https://repo1.maven.org/maven2/org/eclipse/jetty/jetty-distribution/9.4.24.v20191120/jetty-distribution-9.4.24.v20191120.tar.gz
  -ENV JETTY_HOME /var/lib/jetty
   ENV JETTY_BASE /jetty-base
   
   RUN apk add --no-cache curl
  
positive.code: COPY --from=build ./target/classes/jetty /jetty-base
  
  # add war
  COPY --from=build ./target/morfeu-webapp-${VERSION}-SNAPSHOT.war ${JETTY_BASE}/webapps/root.war
  
  # add test data
  RUN mkdir -p ${JETTY_HOME}/target/test-classes/test-resources
  COPY --from=build ./target/test-classes/test-resources ${JETTY_HOME}/target/test-classes/test-resources
  
  
  WORKDIR ${JETTY_HOME}
  #ENTRYPOINT java -jar ./start.jar --module=http jetty.http.port=8980 -D__RESOURCES_PREFIX=file://${JETTY_HOME}/
  #ENTRYPOINT java -jar ./start.jar  -D__RESOURCES_PREFIX=file://${JETTY_HOME}/
  ENTRYPOINT java -jar ./start.jar jetty.base=${JETTY_BASE} -D__RESOURCES_PREFIX=file://${JETTY_HOME}/
  
negative.code: LABEL maintainer="Daniel Giribet - dani [at] calidos [dot] cat"
  
  # variables build stage
  ARG MAVEN_URL=https://apache.brunneis.com/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
  ENV MAVEN_HOME /usr/share/maven
  
  # install dependencies (bash to launch angular build, ncurses for pretty output with tput, git for npm deps)
  