cadvisor fails to start

[bb12489]

Hi, I've been trying to get your monitoring stack working, but kept running into an issue with cadvisor. I kept getting the error of

Error response from daemon: error while creating mount source path '/var/lib/docker': mkdir /var/lib/docker: read-only file system.

A quick search showed that this is because of how Docker was installed on my system (via snap). The docker root directory is different when installed from snap vs a manual install.

More info here