Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.

content/cn/docs/user-guide/nginx-init-containers.yaml

@@ -0,0 +1,29 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+spec:
+  containers:
+  - name: nginx
+    image: nginx
+    ports:
+    - containerPort: 80
+    volumeMounts:
+    - name: workdir
+      mountPath: /usr/share/nginx/html
+  # These containers are run during pod initialization
+  initContainers:
+  - name: install
+    image: busybox
+    command:
+    - wget
+    - "-O"
+    - "/work-dir/index.html"
+    - http://kubernetes.io/index.html
+    volumeMounts:
+    - name: workdir
+      mountPath: "/work-dir"
+  dnsPolicy: Default
+  volumes:
+  - name: workdir
+    emptyDir: {}