/var/lib/docker# sudo du -Sh / --exclude=/proc --exclude=/home --exclude="/srv/*" --exclude="/sharedfolders/*" | sort -rh | head -3
334M    /usr/bin
133M    /usr/lib/x86_64-linux-gnu
125M    /var/lib/docker/overlay2/267a91709e5e3431efe612ca371e5498ba6cda772162721b39811ae70e2976b1/merged/usr/bin