I have a helper function to nuke everything so that our Continuous blah, cycle can be tested, erm... continuously. Basically it boils down to the following:
To clear containers:
docker rm -f $(docker ps -a -q)
To clear images:
docker rmi -f $(docker images -a -q)
To clear volumes:
docker volume rm $(docker volume ls -q)
To clear networks:
docker network rm $(docker network ls | tail -n+2 | awk '{if($2 !~ /bridge|none|host/){ print $1 }}')
Taken from a github comment