Explanation:
Push the image to your registry
Now that you've tagged the image with the fully qualified path to your private registry, you can push it to the registry with docker push:
docker push myregistry.azurecr.io/samples/nginx
https://learn.microsoft.com/en-us/azure/container-registry/container-registry-get-started-docker- cli?tabs=azure-cli#push-the-image-to-your-registry