Manifest missing mediaType

[spurin]

The manifest has no top level mediaType set and I believe that because of this, it doesn't render as expected in the Docker Hub web view. It should show the OS/Arch options.

The following is an example of ubuntu: https://explore.ggcr.dev/?image=ubuntu%3Alatest

VS the current curlimages/curl: https://explore.ggcr.dev/?image=curlimages/curl@sha256:9d679ae7718688259258a3ea3862963023f32eae630052fde63aae5e9919a90d&mt=application%2Fvnd.oci.image.index.v1%2Bjson&size=1043

Example in Docker Hub, note that OS/Arch is empty:

Updating the buildah manifest push command with

--format v2s1
--format v2s2
--format oci

May possibly resolve this.

[spurin]

Referenced on Docker Hub - docker/hub-feedback#2329

[xquery]

well --format oci does not work ... will try the others

[xquery]

checking https://explore.ggcr.dev/?image=curlimages%2Fcurl%3A8.1.2 ... seems to have correct media type

[spurin]

Thanks @xquery

Looking good!