switch projectatomic to containers

Need to get some small changes into libpod to pull back into buildah
to complete buildah transition.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #1270
Approved by: mheon
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f