Authentication

Some registries (or specific images) may require you to be authenticated. For those, you can modify cup.json like this:

{
    "authentication": {
        "<YOUR_REGISTRY_DOMAIN_1>": "<YOUR_TOKEN_1>",
        "<YOUR_REGISTRY_DOMAIN_2>": "<YOUR_TOKEN_2>"
        // ...
    },
    // Other options
}

You can use any registry, like ghcr.io, quay.io, gcr.io, etc.