pass params to docker

Jenkinsfile3

@@ -1,8 +1,5 @@
 pipeline {
-agent { 
-    dockerfile true 
-}
-parameters {
+    parameters {
         string(
             defaultValue: 'heatedboss2',
             description: 'Kaggle username',
@@ -14,12 +11,18 @@ parameters {
             description: 'Kaggle token',
             name: 'KAGGLE_KEY'
         )
-}
-stages {
+    }
+    agent { 
+        dockerfile{
+            additionalBuildArgs  '--build-arg KAGGLE_USERNAME="$KAGGLE_USERNAME"'
+
+        } 
+    }
+    stages {
         stage('Test') {
             steps {
                 sh 'env'
             }
         }
-}
+    }
 }