[ja] Add runAsGroup and change appropriate image

content/ja/examples/pods/security/security-context-2.yaml

@@ -10,4 +10,4 @@ spec:
     image: gcr.io/google-samples/node-hello:1.0
     securityContext:
       runAsUser: 2000
-      allowPrivilegeEscalation: false
+      allowPrivilegeEscalation: false

content/ja/examples/pods/security/security-context-3.yaml

@@ -5,7 +5,4 @@ metadata:
 spec:
   containers:
   - name: sec-ctx-3
-    image: gcr.io/google-samples/node-hello:1.0
-
-
-
+    image: gcr.io/google-samples/node-hello:1.0

content/ja/examples/pods/security/security-context-4.yaml

@@ -8,4 +8,4 @@ spec:
     image: gcr.io/google-samples/node-hello:1.0
     securityContext:
       capabilities:
-        add: ["NET_ADMIN", "SYS_TIME"]
+        add: ["NET_ADMIN", "SYS_TIME"]

content/ja/examples/pods/security/security-context.yaml

@@ -5,15 +5,17 @@ metadata:
 spec:
   securityContext:
     runAsUser: 1000
+    runAsGroup: 3000
     fsGroup: 2000
   volumes:
   - name: sec-ctx-vol
     emptyDir: {}
   containers:
   - name: sec-ctx-demo
-    image: gcr.io/google-samples/node-hello:1.0
+    image: busybox:1.28
+    command: [ "sh", "-c", "sleep 1h" ]
     volumeMounts:
     - name: sec-ctx-vol
       mountPath: /data/demo
     securityContext:
-      allowPrivilegeEscalation: false
+      allowPrivilegeEscalation: false