gpgcheck needs to be enabled in SLEBCI repo overlay

Summary

VAT finding https://vat.dso.mil/vat/finding/CCE-83290-7

In ironbank-tools/ironbank-pipeline!1071 (diffs) a SLE_BCI.repo file has been added. This needs to include the gpgcheck = 1 option as well as per finding.

Tasks

Contributor:

• Update Dockerfile, hardening_manifest.yaml and adhere to Iron Bank requirements
• Ensure container builds successfully in the Iron Bank pipeline~~ update removes a finding
• ~~Provide justifications for findings in the VAT (docs)
• Open a Merge Request from your branch to development
• Apply the ~"Hardening::Review" label to this issue and wait for feedback

Iron Bank:

• Merge contributor branch to development
• Review findings and justifications
• Send approval request to Authorizing Official
• Merge development to master and close issue after approval from Authorizing Official

Note: If the above approval process is rejected for any reason, the Hardening::Review label will be removed and the issue will be sent back to Open. Any comments will be listed in this issue for you to address. Once they have been addressed, you must re-add the Hardening::Review label.

Questions?

Contact the Iron Bank team by commenting on this issue with your questions or concerns. If you do not receive a response, add /cc @ironbank-notifications/onboarding.

Additionally, Iron Bank hosts an AMA working session every Wednesday from 1630-1730EST to answer questions.