anchor.diff:  
   VOLUME ${DATA_DIR}
   
  -# Create an external library directory
  -RUN mkdir -p ${EXT_LIB_DIR}
  -
   # Download optional JDBC drivers to the external library directory
   ADD http://central.maven.org/maven2/org/postgresql/postgresql/42.2.5/postgresql-42.2.5.jar ${EXT_LIB_DIR}
   ADD http://central.maven.org/maven2/mysql/mysql-connector-java/5.1.47/mysql-connector-java-5.1.47.jar ${EXT_LIB_DIR}
  
positive.code: 
  # Create the application directory where Dependency-Track will be installed
  RUN mkdir -p ${APP_DIR}
  
  # Create a user and assign home directory to a non-standard path
  RUN adduser -h ${DATA_DIR} -s bash -D ${USER}
  
negative.code: # Arguments that can be passed at build time
  ARG APP_DIR=/opt/owasp/dependency-track
  ARG DATA_DIR=/data
  ARG EXT_LIB_DIR=${APP_DIR}/extlib
  ARG USER=dtrack
  
  # Environment variables that can be passed at runtime
  