From docker build
Step 5 : RUN plugin install logstash-filter-range logstash-filter-json_encode
---> Using cache
---> d2347580a3d2
Step 6 : COPY conf.d/* /etc/logstash/conf.d/
---> Using cache
---> 2be77abb40f7
From docker-compose build
on the same sources, without changing anything