Address PR review comments

Signed-off-by: Vivek Singh <vivekkmr45@yahoo.in>

Author: viveksyngh

_posts/2020-07-08-event-driven-functions-with-openfaas-and-nats.md

@@ -28,24 +28,31 @@ There are several other connectors which allows you to trigger OpenFaaS function
 
 ![NATS Publish Subscribe](/images/2020-openfaas-nats/nats-publish-subscribe.png "https://docs.nats.io/nats-concepts/pubsub")
 
-## Pre-requisite Installation
+## Prerequisites
 
-* [k3d](https://github.com/rancher/k3d) to create a [k3s](https://github.com/rancher/k3s) cluster. k3s is lightweight distribution of kubernetes from Rancher Labs.
-* [arkade](https://github.com/alexellis/arkade) to install OpenFaaS, nats-connector, kubectl and faas-cl. `arkade` is simple CLI tool to install helm charts and apps to your cluster in one command.
+Before we start we need a couple of tools to help us quickly set up our environment:
+
+* [docker](https://docs.docker.com/get-docker/) - required to use KinD
+* [kind](https://kind.sigs.k8s.io/docs/user/quick-start/) - a tool for running local Kubernetes clusters using Docker
+* [arkade](https://github.com/alexellis/arkade) - official installer for OpenFaaS, that supports many other applications for Kubernetes
 
 > Please make sure you have these tools installed before you proceed next.
 
 ## Install Components
 
-#### Create a kubernetes cluster
+#### Create cluster
 
-`k3d` is a tool to run `k3s` in docker. Create a single node `k3s` cluster. You can also use other tools like [KinD](https://github.com/kubernetes-sigs/kind)
+First thing we need is running Kubernetes cluster:
 
-```
-k3d create
+```bash
+kind create cluster
 ```
 
-Follow instructions returned in the output of this command to configure KUBECONFIG to access the cluster using kubectl.
+Wait for the installation to finish run this command to verify that the cluster is ready:
+
+```bash
+kubectl -n kube-system rollout status deployment/coredns
+```
 
 #### Install OpenFaaS 
 Install OpenFaaS using `arkade`
@@ -103,20 +110,13 @@ echo -n $PASSWORD | faas-cli login --username admin --password-stdin
 
 `publish-message` function publishes message to nats-test topic.
 
-Deploy `receive-message` function
-
-```
-faas-cli deploy --name receive-message --image openfaas/receive-message:latest \
-        --fprocess='./handler' --annotation topic="nats-test"
-```
+Deploy functions
 
-Deploy `publish-message` function
 ```
-faas-cli deploy --name publish-message  --image openfaas/publish-message:latest  \
-         --fprocess='./handler' --env nats_url=nats://nats.openfaas:4222
+faas-cli deploy -f https://raw.githubusercontent.com/openfaas-incubator/nats-connector/master/contrib/test-functions/stack.yml --read-template=false
 ```
 
-> Note: You can also build and deploy this function using the stack.yml and code present in nats-connector repository. But for simplicity, I am using pre built and published images of  these functions.
+> Note: You can also build and deploy this function using the stack.yml and code present in nats-connector repository.
 
 ## Verify the installation
 Invoke `publish-message` function to publish a test message
@@ -143,7 +143,7 @@ faas-cli logs receive-message
 ```
 
 ## What Next ?
-* Do you have a cool "event driven" use case you want to share? Let us know and become a guest blogger!
+* Do you have a cool "event-driven" use case you want to share? Let us know and become a guest blogger!
 
 * If you are new to OpenFaaS, I would recommend you trying [OpenFaaS workshop](https://github.com/openfaas/workshop) .