Add pod with node affinity example

example/example-pod-with-node-affinity.yaml

+apiVersion: v1
+kind: Pod
+metadata:
+  name: volume-test
+  namespace: default
+spec:
+  containers:
+  - name: volume-test
+    image: nginx:stable-alpine
+    imagePullPolicy: IfNotPresent
+    volumeMounts:
+    - name: volv
+      mountPath: /data
+    ports:
+    - containerPort: 80
+  volumes:
+  - name: volv
+    persistentVolumeClaim:
+      claimName: local-path-pvc
+  affinity:
+    nodeAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        nodeSelectorTerms:
+        - matchExpressions:
+          - key: kubernetes.io/hostname
+            operator: In
+            values:
+            - yasker-lp-dev1