Register Timoni Module type with ArtifactHub

[stefanprodan]

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"
  }
}