docs: add diagramatic representation of module

Author: Premdeep Saini

README.md

@@ -1,4 +1,4 @@
-## ECS Terraform Module
+## ECS Cluster Terraform Module
 
 Terraform module which creates Amazon ECS cluster with EC2 launch type
 
@@ -9,6 +9,8 @@ This module creates following resources:
 3. Autoscaling groups for EC2
 4. Launch configuration for EC2
 
+![](./diagram.svg)
+
 
 ### Usage
 ```