update iperf README.md

Signed-off-by: Gong Sophia <sophia.gong@intel.com>

iperf/README.md

@@ -1,22 +1,96 @@
-# iperf3 service on clearlinux
-Iperf is a widely used tool for network performance measurement and tuning.
+# Clear Linux* OS `iperf3` container image
 
-## Build
-```
-sudo docker build -t clearlinux/iperf .
-```
+<!-- Required -->
+## What is this image?
 
-## Run as Server:
-```
-sudo docker run -it --rm --name=iperf-srv -p 5201:5201 clearlinux/iperf -s
-```
+`clearlinux/iperf` is a Docker image with `iperf` running on top of the
+[official clearlinux base image](https://hub.docker.com/_/clearlinux). 
 
-## Run as Client (first get server IP address):
-```
-sudo docker run -it --rm --network=host clearlinux/iperf -c <SERVER_IP>
-```
+<!-- application introduction -->
+> [iperf](https://iperf.fr/) is a tool for active measurements of the maximum achievable 
+> bandwidth on IP networks. It supports tuning of various parameters related to timing, 
+> buffers and protocols (TCP, UDP, SCTP with IPv4 and IPv6). 
 
-## Extra Build ARGs
-- ``swupd_args`` Specifies [SWUPD](https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst#options) flags
+For other Clear Linux* OS
+based container images, see: https://hub.docker.com/u/clearlinux
 
-Default build args in Docker are on: https://docs.docker.com/engine/reference/builder/#arg
+## Why use a clearlinux based image?
+
+<!-- CL introduction -->
+> [Clear Linux* OS](https://clearlinux.org/) is an open source, rolling release
+> Linux distribution optimized for performance and security, from the Cloud to
+> the Edge, designed for customization, and manageability.
+
+Clear Linux* OS based container images use:
+* Optimized libraries that are compiled with latest compiler versions and
+  flags.
+* Software packages that follow upstream source closely and update frequently.
+* An aggressive security model and best practices for CVE patching.
+* A multi-staged build approach to keep a reduced container image size.
+* The same container syntax as the official images to make getting started
+  easy. 
+
+To learn more about Clear Linux* OS, visit: https://clearlinux.org.
+
+<!-- Required -->
+## Deployment:
+
+### Deploy with Docker
+The easiest way to get started with this image is by simply pulling it from
+Docker Hub. 
+
+
+1. Pull the image from Docker Hub: 
+    ```
+    docker pull clearlinux/iperf
+    ```
+
+2. Start a container using the examples below:
+
+    ## Run as Server:
+    ```
+    sudo docker run -it --rm --name=iperf-srv -p 5201:5201 clearlinux/iperf -s
+    ```
+    
+    ## Run as Client (first get server IP address):
+    ```
+    sudo docker run -it --rm --network=host clearlinux/iperf -c <SERVER_IP>
+    ```
+    
+<!-- Optional -->
+### Deploy with Kubernetes
+
+<!-- Required -->
+## Build and modify:
+
+The Dockerfiles for all Clear Linux* OS based container images are available at
+https://github.com/clearlinux/dockerfiles. These can be used to build and
+modify the container images.
+
+1. Clone the clearlinux/dockerfiles repository.
+    ```
+    git clone https://github.com/clearlinux/dockerfiles.git
+    ```
+
+2. Change to the directory of the application:
+    ```
+    cd iperf/
+    ```
+
+3. Build the container image:
+    ```
+    docker build -t clearlinux/iperf .
+    ```
+
+   Refer to the Docker documentation for [default build arguments](https://docs.docker.com/engine/reference/builder/#arg).
+   Additionally:
+   
+   - `swupd_args` - specifies arguments to pass to the Clear Linux* OS software
+     manager. See the [swupd man pages](https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst#options)
+     for more information.
+
+<!-- Required -->
+## Licenses
+
+All licenses for the Clear Linux* Project and distributed software can be found
+at https://clearlinux.org/terms-and-policies