Answer: Docker push command

The `docker push` command is used to push an image or a repository to a registry, such as Container Registry. It requires specifying the hostname where the image will be stored, using prefixes like `gcr.io` for multi-region hosting. For example, `us.gcr.io` hosts images in the United States, `eu.gcr.io` in the European Union, and `asia.gcr.io` in Asia. The Docker credential helper simplifies Docker's authentication with Container Registry, enabling the use of Docker commands for tagging, pushing, and pulling images. Alternatively, client libraries or direct interaction with the Docker API can manage container images.

Author: LeetQuiz Editorial Team