update rootless podman to 0.3
Use newest rootless podman image to resolve /etc/containers/containers.conf errors.
Basic testing occurred locally by building rootless-podman:0.3 with rootless-podman:0.3.
UNCLASSIFIED - NO CUI
Iron Bank will be replacing the old container signing certificate with the new container signing certificate. No additional action is required. Users can find additional information regarding the certificate rotation and container signature verification here and here.
Use newest rootless podman image to resolve /etc/containers/containers.conf errors.
Basic testing occurred locally by building rootless-podman:0.3 with rootless-podman:0.3.
UNCLASSIFIED - NO CUI