limit building deployment artifact

+ added buildArtifact variable and set it to true
+ in auditing stage, if there's an error, set buildArtifact to false
+ in build artifact stage, if buildArtifact is true, build  it

Jenkinsfile

@@ -1,3 +1,5 @@
+def buildArtifact = true
+
 pipeline {
   agent { label 'ruby && freebsd' }
   
@@ -25,8 +27,16 @@ pipeline {
     stage('Audit Dependencies') {
       steps {
         catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
-          sh 'bundle exec ruby-audit check'
-          sh 'bundle exec bundle-audit check >> audit.html'
+          script {
+            try {
+              sh 'bundle exec ruby-audit check'
+              sh 'bundle exec bundle-audit check >> audit.html'
+            } catch (e) {
+              script {
+                buildArtifact = false
+              }
+            }
+          }
         }
       }
     }
@@ -61,7 +71,11 @@ pipeline {
     }
     stage('Build production deliverable') {
       steps {
-        echo "BUILD RESULT: ${buildResult}"
+        when {
+          expression {
+            buildArtifact
+          }
+        }
         catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
           sh ''' #!/usr/local/bin/bash
             ZIP_FILE="url-shortener_${BRANCH_NAME}_$(date "+%Y-%m-%d_%H-%M-%S").tgz"