Update Jenkinsfile

Jenkinsfile

@@ -1,11 +1,9 @@
 pipeline {
     agent any
     
-    stages {
+    options {
-        stage('Preparation') { 
+        properties([
-            steps {
+            parameters([
-                script {
-                parameters([
                     string(
                         defaultValue: 'jakubbg',
                         description: 'Kaggle username',
@@ -18,9 +16,10 @@ pipeline {
                         name: 'KAGGLE_KEY'
                     )
                 ]) 
-            }
+        ])
-            }
+    }
-        }
+
+    stages {
         stage('Build') {
             steps {
                 // Run the maven build