Add whatokk Lab3 and Lab4 reports

reports/whatokk_Lab3_Lab4_experiment_record.md

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+# Lab3 and Lab4 Experiment Record
+
+- Student: 姜丞骏
+- GitHub account: whatokk
+- Experiments:
+  - Lab3: Kubernetes and Minikube tutorials
+  - Lab4: Istio Getting Started with Bookinfo and dashboard add-ons
+- Evidence repository: https://github.com/whatokk/cloud-labs-03-04-kubernetes-istio
+- Successful Actions run: https://github.com/whatokk/cloud-labs-03-04-kubernetes-istio/actions/runs/27429016540
+- Execution environment: GitHub Actions Ubuntu runner with Docker, minikube, kubectl, and istioctl
+
+## Lab3 Key Results
+
+- Started a minikube Kubernetes cluster with the Docker driver.
+- Deployed and exposed `hello-minikube`; HTTP access returned the echo server response.
+- Deployed `kubernetes-bootcamp`, inspected pod details, logs, and environment variables.
+- Exposed the bootcamp deployment through NodePort and verified HTTP access.
+- Scaled the deployment to 4 replicas and observed requests served by multiple pods.
+- Performed a rolling update to `nginx:1.27-alpine` and rolled back to `gcr.io/google-samples/kubernetes-bootcamp:v1`.
+
+## Lab4 Key Results
+
+- Installed Istio 1.27.1 with the demo profile.
+- Verified `istiod`, ingress gateway, and egress gateway pods in `istio-system`.
+- Installed Gateway API CRDs and created the Bookinfo Gateway and HTTPRoute.
+- Deployed Bookinfo services and confirmed productpage, details, ratings, and reviews pods were running with sidecars.
+- Accessed the Bookinfo Product Page through port-forward; the HTML title was `Simple Bookstore App`.
+- Installed dashboard add-ons and verified Kiali, Prometheus, Grafana, tracing, and jaeger-collector services.
+
+## Submitted PDFs
+
+- `reports/whatokk_Lab3_Kubernetes_Minikube_Report.pdf`
+- `reports/whatokk_Lab4_Istio_Bookinfo_Report.pdf`
+- `reports/whatokk_Lab3_Lab4_Kubernetes_Istio_Report.pdf`