Adding initial GitHub Actions

scripts/determine-machine-type.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+function check_env() {
+    eval ev='$'$1
+    if [ "$ev" == "" ]; then
+      echo "$1 not defined"
+      exit 1
+    fi
+}
+check_env CLUSTER_NAME
+check_env REGION
+set +e
+MACHINE_TYPE=$(gcloud container clusters describe $CLUSTER_NAME --region $REGION "--format=table(nodeConfig.machineType)" 2>/dev/null | grep -v "MACHINE_TYPE")
+RC=$?
+if ((RC > 0)); then
+    exit 0
+fi
+echo "$MACHINE_TYPE"