readme updated

Author: shamimice03

README.md

@@ -1,13 +1,14 @@
 ## AWS EKS Monitoring and Logging (Using Container Insights)
 
+### Prerequisite
 We must grant IAM permissions to enable Amazon EKS worker nodes to send metrics and logs to CloudWatch:
 
-### Manual Steps:
+#### Manual Steps:
 - Attach AWS managed `CloudWatchAgentServerPolicy` to the IAM roles of the EKS worker nodes. 
 - Policy `ARN` : `arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy` 
 
 
-### Using terraform:
+#### Using terraform:
 This terraform module provides an option to attach IAM Policy to EKS nodegroup roles : 
 ```hcl
 # Attach CloudWatchAgentServerPolicy to EKS nodegroup roles