private AuthConfigurations getAuthConfigs(Map<String, ImageRegistry> registryMap) {
        if (registryMap == null) {
            return null;
        }
        AuthConfigurations authConfigs = new AuthConfigurations();
        registryMap.entrySet().forEach(registryEntry -> authConfigs.addConfig(getAuthConfig(registryEntry.getValue())));
        return authConfigs;
    }
DockerClientImpl is docker client to docker daemon to perform all
image actions like pull image, tag image, push image etc.
It connects to the docker daemon through an environment
variable @see ImageBuilderConfig.getDockerHost() or through to
the default host based on the operating system.
image-builder/builder-services/src/main/java/io/hyscale/builder/services/docker/impl/DockerRESTClient.java