SILVERPEAS_VERSION
the version of Silverpeas for which the documentation will be generated
IMAGE
The version of the Docker image used to build Silverpeas
VERSION
A version of Silverpeas for which the documentation has to be generated and then published
PRJ_VERSION
The version of the Silverpeas global project definition in which are defined a lot of information about Silverpeas as well as the common required dependencies to build a Silverpeas project.