message: clean docker image cache on tag deployments
diff: @@ -39,6 +39,15 @@ node {
  env.GIT_COMMIT = checkout["GIT_COMMIT"]
  }
  + // in order to have the newest images from upstream (with all the security updates) we clean our local docker cache on tag deployments
  + // we don't do this all the time to still profit from image layer caching
  + // but we want this on tag deployments in order to ensure that we publish images always with the newest possible images.
  + if (env.TAG_NAME) {
  + stage ('clean docker image cache') {
  + sh "docker image prune -af"
  + }
  + }
  +
  stage ('build images') {
  sh "make -O${SYNC_MAKE_OUTPUT} -j6 build"
  }
  