Added section to teardown instances.

5-teardown-cloud-resources.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# Step 5 - Teardown cloud resources
+
+# The Google Cloud Platform resources created by this process come at a cost, so it's important we have an easy way to teardown those resources as soon as we're finished with them.
+
+# Tangle the shell block below to a shell script by pressing *, b t* in emacs command mode:
+
+
+# Iterate over any matching projects
+for project in $(gcloud projects list | awk '{ print $1 }' | grep gitlab); do
+
+  # Iterate over any instances in the project
+  for instance in $(gcloud compute instances list --project $project --format="value(name)"); do
+
+    # Delete the instance
+    gcloud compute instances delete --quiet $instance --zone australia-southeast1-a
+  done
+done