Have a 16Gb SD card in the PI and have been running Brewblox since released on Beta.
Looked today and only have 940Mb of free space left.
sudo du -k | sort -n -r | head shows the following large folders.
13609764 ./var 13021772 ./var/lib 12932596 ./var/lib/docker 11700520 ./var/lib/docker/overlay2 1217000 ./usr 1182536 ./var/lib/docker/volumes 534124 ./usr/lib 482012 ./var/cache 473620 ./var/cache/apt
Obviously most space is used in the overlay2 folder.
any ideas how to reduce this?