ChaGPT added lab simulations

lab-environment/reset-lab.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+CLUSTER_NAME="cks-lab"
+export KUBECONFIG="/opt/cks-lab/kubeconfig"
+
+if [[ "$CLUSTER_NAME" != "cks-lab" ]]; then
+  echo "Refusing to delete an unexpected cluster name." >&2
+  exit 1
+fi
+
+systemctl start docker 2>/dev/null || service docker start
+if kind get clusters | grep -Fxq "$CLUSTER_NAME"; then
+  kind delete cluster --name "$CLUSTER_NAME"
+else
+  echo "The cks-lab cluster does not exist."
+fi
+rm -f "$KUBECONFIG"
+