Can docker use http request to pull images from private registry?

Question

I want to capture http requests when I pull images from private registry. But it doesn't work. I use wireshark and only capture tcp requests.

I use

sudo docker run -d  -v /opt/registry/data:/var/lib/registry -p 5000:5000  --name myregistry registry:latest

to start my private registry. And add

{
   "insecure-registries": [
      "127.0.0.1:5000"
    ]
}

in /etc/docker/daemon.json

Use

sudo docker tag ubuntu:latest 127.0.0.1:5000/ubuntu:latest

and

sudo docker push 127.0.0.1:5000/ubuntu:latest

to push images to private registry.

And use

sudo docker pull 127.0.0.1:5000/ubuntu:latest

to pull images from private registry.

But when I add a http url:http://f1361db2.m.daocloud.io in the registry-mirrors. I can capture http requests when I pull images.

Is this because I deploy the private registry in a wrong way？ Or it doesn't support http protocol in private registry?

Best regards.

Thanks!