Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.

content/en/docs/tasks/configure-pod-container/security-context.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: security-context-demo
+spec:
+  securityContext:
+    runAsUser: 1000
+    fsGroup: 2000
+  volumes:
+  - name: sec-ctx-vol
+    emptyDir: {}
+  containers:
+  - name: sec-ctx-demo
+    image: gcr.io/google-samples/node-hello:1.0
+    volumeMounts:
+    - name: sec-ctx-vol
+      mountPath: /data/demo
+    securityContext:
+      allowPrivilegeEscalation: false