dump the zip file, let's see how it's working?

Jenkinsfile

@@ -49,6 +49,9 @@ pipeline {
         }
         catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
           sh ''' #!/usr/local/bin/bash
+            echo $ZIP_FILE
+            echo ${ZIP_FILE}
+            echo ${env.ZIP_FILE}
             CUR_DIR=$(pwd)
             mkdir -p /tmp/url-shortener
             cp -R * /tmp/url-shortener