version="1.0.0"
repository="swr.eu-de.otc.t-systems.com"
tag="latest"
image="swr.eu-de.otc.t-systems.com/omnia-test/${repository}:${version}.${env.BUILD_NUMBER}"
namespace="demo"

podTemplate(label: 'pod', cloud: 'k8s-config', serviceAccount: 'jenkins-admin',
  imagePullSecrets: [
      'default-secret'
  ], 
  containers: [
    containerTemplate(
            name: 'docker', image: 'wr.eu-de.otc.t-systems.com/base-image/docker:dind', ttyEnabled: true, command: 'cat', privileged: true,   
            envVars: [
                secretEnvVar(key: "PASS", secretName: "docker-reg", secretKey: "docker-reg") 
            ]
    ),
  ],
) {
    node('pod') {
        stage('Build Docker Image') {
            container('docker') {
                sh """
                 ...
                """
                milestone(1)
            }
        }
    }
}