add docs on kubectl install & setup

docs/server/source/cloud-deployment-templates/node-on-kubernetes.rst

@@ -3,18 +3,44 @@ Run a BigchainDB Node in a Kubernetes Cluster
 
 Assuming you already have a `Kubernetes <https://kubernetes.io/>`_
 cluster up and running, this page describes how to run a
-BigchainDB node on it.
+BigchainDB node in it.
 
-Step 1: Install and Configure kubectl
+
--------------------------------------
+Step 1: Install kubectl
+-----------------------
 
 kubectl is the Kubernetes CLI.
-See the `Kubernetes docs to install and configure kubectl
+If you don't already have it installed,
+then see the `Kubernetes docs to install it
 <https://kubernetes.io/docs/user-guide/prereqs/>`_.
 
 
+Step 2: Configure kubectl
+-------------------------
+
+The default location of the kubectl configuration file is ``~/.kube/config``.
+If you don't have that file, then you need to get it.
+
+If you deployed your Kubernetes cluster on Azure
+using the Azure CLI 2.0 (as per :doc:`our template <template-kubernetes-azure>`),
+then you can get the ``~/.kube/config`` file using:
+
+.. code:: bash
+
+   $ az acs kubernetes get-credentials \
+   --resource-group <name of resource group containing the cluster> \
+   --name <ACS cluster name>
+
+
+Step 3: Run a MongoDB Container 
+-------------------------------
+
+To start a MongoDB Docker container in a pod on one of the cluster nodes:
+
+.. code:: bash
+
+   $ kubectl ?????
 
 
 Note: The BigchainDB Dashboard can be deployed
 as a Docker container, like everything else.
-