docker to Jenkinsfile in dataset-stats

dataset_stats/Jenkinsfile

@@ -1,5 +1,7 @@
 pipeline {
-    agent any
+    agent {
+        docker { image 'shroomy/ium:1' }
+    }
     parameters {
         buildSelector(defaultSelector: 
         lastSuccessful(), 
@@ -7,6 +9,11 @@ pipeline {
         name: 'BUILD_SELECTOR')
     }
     stages {
+        stage('Test') {
+            steps {
+                sh 'cat /etc/issue'
+            }
+        }
         stage("copyArtifacts"){
             steps {
                 copyArtifacts fingerprintArtifacts: true,