Copying a container image from one repository to another is a common DevOps task. Sometimes, it's necessary because the image is changing homes; other times, it's motivated by Docker Hub's aggressive rate limiting; and often, it's simply a matter of "mirroring" public images using the company's internal registry.
In simpler cases, this task can be accomplished with the classic docker pull + docker tag + docker push combo.
In more complex scenarios, using specialized tools like crane, skopeo, or regctl may be more efficient.
And for copying multi-platform images, understanding remote image composition is essential to getting the job done correctly.
This skill path starts with the basic single-platform/single-tag image copy case and gradually introduces more complex scenarios, such as multi-platform images and copying all image tags from one repository to another.
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