--log.custom-level

New version:

docker run ... \
	--log-driver json-file \
	--log-opt max-size=10m \
	--log-opt max-file=3 \
	--name storagenode storjlabs/storagenode:latest \
	--log.level=info \
	--log.custom-level=piecestore=FATAL,collector=FATAL,blobscache=FATAL \
...