Inconvenient error if Docker is not running #76
Description
When running: surfkit list trackers
If Docker is not running it throws a traceback error and warns the user the following: FileNotFoundError: Neither '/var/run/docker.sock' nor '/Users//.docker/run/docker.sock' are available.Please make sure you have Docker installed and running.
It should likely just be a handled exception and tell the user that docker does not appear to be running or installed. Either start docker or install it and try again.