Update volumes.md

Update docs and example for NFS Plugin

Modified the wording around how many Volumes exist

Cleaned up the text around the NFS Pod description

Fixed Spelling mistake on read-only

docs/volumes.md

@@ -17,7 +17,7 @@ and to select the type of media to use, for clusters that have several media typ
 
 ## Types of Volumes
 
-Kubernetes currently supports three types of Volumes, but more may be added in the future.
+Kubernetes currently supports multiple types of Volumes. The community welcomes additional contributions.
 
 ### EmptyDir
 
@@ -84,4 +84,8 @@ desiredState:
 id: testpd
 kind: Pod
 ```
+### NFS
 
+Kubernetes NFS volumes allow an existing NFS share to be made available to containers within a pod. 
+
+[The NFS Pod example](https://github.com/GoogleCloudPlatform/kubernetes/blob/master/examples/nfs/test.yaml) demonstrates how to specify the usage of an NFS volume within a pod. In this example one can see that a volumeMount called "myshare" is being mounted onto /var/www/html/mount-test in the container "testpd". The volume "myshare" is defined as type nfs, with the NFS server serving from 172.17.0.2 and exporting directory /tmp as the share. The mount being created in this example is not read only. 

examples/nfs/test.yaml

@@ -6,12 +6,12 @@ desiredState:
         image: dockerfile/nginx
         volumeMounts:
             # name must match the volume name below
-            - name: nfs
+            - name: myshare
               mountPath: "/var/www/html/mount-test"
     id: nfspd
     version: v1beta1
     volumes:
-      - name: nfs
+      - name: myshare
         source:
           nfs:
             server: "172.17.0.2"