Managing container images with Skopeo

So far, we have learned about many container registry concepts, including the differences between private and public registries, their compliance with OCI image specifications, and how to consume images with Podman and Buildah to build and run containers.

However, sometimes we need to implement simple image manipulation tasks such as moving an image from a registry to a mirror, inspecting a remote image without the need to pull it locally, or even signing images.

The community that gave birth to Podman and Buildah developed a third amazing tool, Skopeo (https://github.com/containers/skopeo), which exactly implements the features described previously.

Skopeo was designed as an image and registry manipulation tool for DevOps teams and is not intended to run containers (the main role of Podman) nor build OCI images (the main role of Buildah). Instead, it offers a minimal and straightforward command-line interface with basic image manipulation...