podman/docs/source/markdown/options/sign-by-sigstore.md

####> This option file is used in: ####> podman artifact push, manifest push, push ####> If file is edited, make sure the changes ####> are applicable to all of those.

--sign-by-sigstore=param-file

Add a sigstore signature based on further options specified in a container's sigstore signing parameter file param-file. See containers-sigstore-signing-params.yaml(5) for details about the file format.