Managing additional OCI media types

By default the following list of media types is enabled in the Container Registry:

* OCI images
* Helm
* Cosign, SBOMs, attestations
* Source containers
* Singularity
* Conftest policies
* WASM

For any other OCI media type that is not supported by default, you can add them to the ADDITIONAL_OCI_ARTIFACT_TYPES setting using the following format:

ADDITIONAL_OCI_ARTIFACT_TYPES = {
   "<oci config type 1>": [
       "<oci layer type A>",
       "<oci layer type B>",
   ],
   "<oci config type 2>": [
       "<oci layer type C>",
       "<oci layer type D>",
   ],
}

For example, you can add support for custom defined mediatype by adding the following to your ADDITIONAL_OCI_ARTIFACT_TYPES setting:

ADDITIONAL_OCI_ARTIFACT_TYPES = {
   "<oci config type 1>": [
       "<oci layer type A>",
       "<oci layer type B>",
   ],
   "<oci config type 2>": [
       "<oci layer type C>",
       "<oci layer type D>",
   ],
   "application/vnd.guardians.groot.config.v1+json": [
       "text/plain",
       "application/vnd.guardians.groot.docs.layer.v1+tar",
   ],
}

.. note::

When adding OCI media types that are not configured by default, it is necessary then to manually add the Default oci types to the list. The OCI image-spec types are supported by default, they are built-in and cannot be disabled, it is not necessary to add them manually to the list.