testing removing overlay2 dir

.github/workflows/preview.yaml

@@ -72,6 +72,6 @@ jobs:
 
           echo cleaning up docker files as kind load docker-image seems to leave dangling files in the data directory that docker does not detect and so pruning with docker cli doesnt work
           sudo systemctl stop docker
-          sudo rm -rf /var/lib/docker
+          sudo rm -rf /var/lib/docker/overlay2
           sudo systemctl start docker
           docker network create -d=bridge --subnet=172.19.0.0/24 kind || true