message: we need the lumberjack plugin
diff: ARG IMAGE_REPO
  FROM ${IMAGE_REPO:-lagoon}/logstash
  -RUN bin/logstash-plugin install logstash-input-http
  +RUN bin/logstash-plugin install logstash-input-lumberjack
  # Remove default shipped pipeline
  RUN rm -f pipeline/logstash.conf
  