Add link to secure agent repo
cc @ERIC.SCHOVILLE @SHREYASH.SHRESTHA @NUWAN.KUMARASIRI @jont - could someone review this?
On December 29, GitLab will be migrating to the next generation Container Registry, which implements automatic garbage collection. See KB news article for edge cases in which you could need to rebuild a container after the migration.
cc @ERIC.SCHOVILLE @SHREYASH.SHRESTHA @NUWAN.KUMARASIRI @jont - could someone review this?