What are the ways of using a Docker image registry?

In some research and projects, you may opt to use private Docker registries other than using the Docker Hub or any other kind of registries. For example, this might be for instances deploying Docker registry on a specific or a random serve or even deploying on third party registry like Nexus.

Once you manage to merge these private registries with your chosen server, you should get a secure registry with an SSL certificate concerning best practices. You may opt to use a private registry insecurely if you want to use a self-signed SSL certificate. Note that this is supposed to be used only for testing purposes. To initiate this, you have to add your test registry privately parallel to an array representing the insecure registry's value as insecure-registries key on daemon.json file config.