jenkins_test/Jenkinsfile

podTemplate(containers: [
  containerTemplate(
      name: 'jnlp', 
      image: 'jenkins/inbound-agent:latest'
    )
  ]) {
    node(POD_LABEL) {
        stage('Get a Maven project') {
            container('jnlp') {
                stage('Say Hello') {
                    sh '''
                    echo "Hello! I am executing shell"
                    '''
                }
            }
        }
    }
}