Merge branch '2021-03-16-Branched_from_master-ELK-stack' into 'master'

SDP/SDP/SDP.py

devices/src/hardware_device.py

devices/src/lofar_logging.py

docker-compose/elk-configure-host/Dockerfile

docker-compose/elk.yml

docker-compose/elk/Dockerfile

docker-compose/elk/kibana/default-objects.ndjson

docker-compose/elk/logstash/conf.d/02-beats-input.conf

docker-compose/elk/logstash/conf.d/03-syslog-input.conf

docker-compose/elk/logstash/conf.d/04-tcp-input.conf

docker-compose/elk/logstash/conf.d/10-syslog.conf

docker-compose/elk/logstash/conf.d/11-nginx.conf

docker-compose/elk/logstash/conf.d/30-output.conf

docker-compose/jupyter.yml

docker-compose/jupyter/Dockerfile

docker-compose/jupyter/jupyter-notebook

docker-compose/lofar-device-base/Dockerfile

docker-compose/lofar-device-base/lofar-requirements.txt