Add stubs for post-build actions.

Jenkinsfile

@@ -30,5 +30,25 @@ pipeline {
         }
     }
 
+	// post-build actions
+	post {
+        always {
+            echo 'This will always run'
+        }
+        success {
+            echo 'This will run only if successful'
+        }
+        failure {
+            echo 'This will run only if failed'
+        }
+        unstable {
+            echo 'This will run only if the run was marked as unstable'
+        }
+        changed {
+            echo 'This will run only if the state of the Pipeline has changed'
+            echo 'For example, if the Pipeline was previously failing but is now successful'
+        }
+    }
+   
 }