timoni Register Timoni Module type with ArtifactHub

We should try to add the Timoni Module as a supported type in ArtifactHub. Modules which are published on public container registries could then be listed on https://artifacthub.io.

A Timoni module is an OCI artifact with the following media types:

artifact media type application/vnd.oci.image.manifest.v1+json
config media type application/vnd.timoni.config.v1+json
content media type application/vnd.timoni.content.v1.tar+gzip

ArtifactHub can list the versions of a module by querying the container repository tags.

ArtifactHub can extract the OCI annotations for each module version to display information such as:

Description (optional) org.opencontainers.image.description
License (optional) org.opencontainers.image.licenses
Created date org.opencontainers.image.created
Version org.opencontainers.image.revision
Source code repo org.opencontainers.image.source
Readme markdown link org.opencontainers.image.documentation

The org.opencontainers.image.documentation contains the full URL to the markdown file which can be rendered in ArtifactHub.

Example:

$ crane manifest ghcr.io/stefanprodan/modules/podinfo|jq
{
  "schemaVersion": 2,
  "mediaType": "application/vnd.oci.image.manifest.v1+json",
  "config": {
    "mediaType": "application/vnd.timoni.config.v1+json",
    "size": 233,
    "digest": "sha256:3de741c3faf410c540698083003f86747d5c38fd5c0a217d3a471395c514d217"
  },
  "layers": [
    {
      "mediaType": "application/vnd.timoni.content.v1.tar+gzip",
      "size": 164527,
      "digest": "sha256:a2a86fead1ddb43a219255093ac749e2b15e848d2234ef733b2e7d5388177099"
    }
  ],
  "annotations": {
    "org.opencontainers.image.created": "2023-04-08T11:15:09Z",
    "org.opencontainers.image.description": "A timoni.sh module for deploying Podinfo.",
    "org.opencontainers.image.documentation": "https://github.com/stefanprodan/timoni/blob/main/examples/podinfo/README.md",
    "org.opencontainers.image.revision": "6.3.5",
    "org.opencontainers.image.source": "https://github.com/stefanprodan/podinfo"
  }
}

Apr 12 '23 08:04 stefanprodan

One nice to have feature would be for ArtifactHub to display the default CUE values like it does for Helm. For this, I guess we need to extract the CUE values at push time and store them somewhere, maybe inside the application/vnd.timoni.config.v1+json layer?

Apr 12 '23 09:04 stefanprodan

I can take care of this one ☝️