PullApprove has support to check for DCO reqs
PullApprove has support to check for DCO reqs

Signed-off-by: Chris Aniszczyk <2a3e0ec6821d10bf53e535c46e422f24d94584b5@gmail.com>

opencontainers/image-spec,xiekeyang/image-tools,xiekeyang/image-tools,mattspencer-arm/image-spec,jonboulle/image-spec,vbatts/oci-image-spec,opencontainers/image-tools,opencontainers/image-tools,opencontainers/image-spec,mattspencer-arm/image-spec,jonboulle/image-spec,vbatts/oci-image-spec