Update production-pods.md and replace rc with deployments

docs/user-guide/nginx-lifecycle-deployment.yaml

@@ -0,0 +1,20 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: nginx
+spec:
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        ports:
+        - containerPort: 80
+        lifecycle:
+          preStop:
+            exec:
+              # SIGTERM triggers a quick exit; gracefully terminate instead
+              command: ["/usr/sbin/nginx","-s","quit"]