import org.jenkinsci.plugins.pipeline.modeldefinition.config.GlobalConfig;
import org.jenkinsci.plugins.docker.commons.credentials.DockerRegistryEndpoint;
import java.util.logging.Logger;

Logger logger = Logger.getLogger("pipeline-api-endpoint");
logger.info("about to add Docker Registry configuration");
GlobalConfig pipelineConfig = GlobalConfig.get();
DockerRegistryEndpoint registryConfig = new DockerRegistryEndpoint("{{ jenkins_docker_registry_host }}:{{ jenkins_docker_registry_port }}", "");
pipelineConfig.setRegistry(registryConfig);
pipelineConfig.save();
logger.info("added Docker Registry configuration");