How to config image registry?

Hi,

I'd like to understand how to config the credential or http access of an image registry in firecracker-containerd, like this: [containerd-Configure Image Registry](https://github.com/containerd/containerd/blob/main/docs/cri/registry.md) ? I need to use a local image registry which only provides http access. I know the command line provides `--plain-http` option to access insecure registry. But I'm using go sdk to invoke firecraker-containerd, not via command line. I would get error "http: server gave HTTP response to HTTPS client" when starting a VM. Is it possible to config when I use go sdk ?

Thanks.