Create a Container Registry
On the navigation bar, choose the project where you want to create a registry.
On the project sidebar menu, choose Packages.
On the Packages page, click New repository.
In the New Package Repository window, specify repository settings:
Type: choose Container Registry.
Name and Description: specify the registry name (it must be a unique identifier) and description.
Access to repository: choose whether the repository can be accessed by unauthenticated users. Learn more
Immutable tag names: If you enable this option, users will be not allowed to push images with the same tag. This means that the tag becomes a unique image identifier. The most popular usage of tag immutability is image versioning: it is not possible to publish an image with the same version twice. This is exactly how versioning is organized, for example, on Docker Hub:
After you create the registry, click the Get Started button to see the command-line snippets that will help you get started: connect to the registry, publish, and get images. Here you can also Generate personal token for accessing the registry.
On the top of the page you can copy the repository URL. A URL of a particular image is always a namespace with the image name in the end. For example, in case of a private registry: