Moving docs from /vX to /docs; we will use branches for old versions.

docs/user-guide/node-selection/pod.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+  labels:
+    env: test
+spec:
+  containers:
+  - name: nginx
+    image: nginx
+    imagePullPolicy: IfNotPresent
+  nodeSelector:
+    disktype: ssd