node {    
      def app     
      stage('Clone repository') {               
             
            checkout scm    
      }  
    
      stage('Build image') {         
       
            app = docker.build("sparafinski/ium", "./Docker/")    
       } 
    
      stage('Split set into dev/train/test') {           
            app.inside {

                  sh 'echo "Raz dwa trzy"'
                  sh 'mkdir Test'
                  sh 'pwd'
                  sh 'ls -la'
                  
            }    
      }     
}