Added illustration for orkestra design (#9)

Signed-off-by: Nitish Malhotra <nitish.malhotra@gmail.com>

README.md

@@ -19,7 +19,9 @@ Take, for example, **Continuous Deployment of mission-critical applications** -
 
 ## How it works
 
-To solve the complex application orchestration problem Orkestra builds a [Directed Acyclic Graph](https://en.wikipedia.org/wiki/Directed_acyclic_graph) using the application and it's dependencies and submits it to Argo Workflow. The Workflow nodes use [`workflow-executor`](https://argoproj.github.io/argo/workflow-executors/) nodes to deploy a [`HelmRelease`](https://docs.fluxcd.io/projects/helm-operator/en/stable/references/helmrelease-custom-resource/#helm.fluxcd.io/v1.HelmReleaseSpec) object into the cluster. This `HelmRelease` object signals Flux's HelmOperator to perform a "Helm Action" on the referenced chart.
+<p align="center"><img src="./assets/orkestra-core.png" width="750x" /></p>
+
+To solve the complex application orchestration problem Orkestra builds a [Directed Acyclic Graph](https://en.wikipedia.org/wiki/Directed_acyclic_graph) using the application and it's dependencies and submits it to Argo Workflow. The Workflow nodes use [`workflow-executor](https://argoproj.github.io/argo/workflow-executors/) nodes to deploy a [`HelmRelease`](https://docs.fluxcd.io/projects/helm-operator/en/stable/references/helmrelease-custom-resource/#helm.fluxcd.io/v1.HelmReleaseSpec) object into the cluster. This `HelmRelease` object signals Flux's HelmOperator to perform a "Helm Action" on the referenced chart.
 
 ## Features