Add back Jenkinsfile

Jenkinsfile

@@ -0,0 +1,19 @@
+#!groovy
+
+node('packer') {
+  stage 'Checkout'
+
+    checkout scm
+
+  stage 'Acquire ansible-playbooks'
+
+    git([ url: "https://github.internet2.edu/docker/ansible-playbooks.git",
+        credentialsId: "jenkins-github-access-token" ])
+
+
+  stage 'Validate'
+
+    sh '/usr/local/bin/packer validate shibboleth-appliance-vbox.json'
+
+
+}