makefile: automatically select docker or podman container tools

After having forgot to explicitly pass CONTAINER_CMD for the millionth
time I figured copying ceph-csi a smidgen and automatically selecting
podman or docker based on availability would be save me some typing.

Signed-off-by: John Mulligan <jmulligan@redhat.com>
This commit is contained in:
John Mulligan 2020-06-09 16:13:10 -04:00 committed by John Mulligan
parent 68f8ce2fee
commit 38e9b9a260