fixed jenkinsfiles

Jenkinsfile

@@ -1,16 +1,13 @@
 pipeline {
-    agent any
+    agent { 
+            dockerfile true
+        }
     stages {
         stage('Clone repository') {
             steps {
                 git branch: 'master', url: 'https://git.wmi.amu.edu.pl/s487176/ium_487176'
             }
         }
-        stage('Docker'){
-            agent { 
-                    dockerfile true
-            }
-        }
         stage('Run script') {
             steps {
                 sh 'sh getdata.sh'

Jenkinsfile-dataset_stats

@@ -1,5 +1,7 @@
 pipeline {
-    agent any
+    agent { 
+            dockerfile true
+        }
     parameters{
           buildSelector(
               defaultSelector: lastSuccessful(),
@@ -12,11 +14,7 @@ pipeline {
                     git branch: 'master', url: 'https://git.wmi.amu.edu.pl/s487176/ium_487176'
                 }
             }
-        stage('Docker'){
-            agent { 
-                    dockerfile true
-            }
-        }
+        
         stage('Copy Artifacts') {
                 steps { 
                     copyArtifacts(