added default and some descriptions

Author: hrai-nr

README.md

@@ -21,18 +21,20 @@ To try this integration out you can use the `sam` cli to deploy the cloudformati
 #### CloudFormation Parameters
 
 - `NewRelicRegion` : Can either be `US` or `EU` depending on which endpoint to be used to push logs to New Relic
+  - For this param `US` is default
 - `LicenseKey`: Used when forwarding logs to New Relic
 - `LogGroupConfig` : String representation of JSON array of objects of your CloudWatch LogGroup(s) and respective filter (if applicable) to set the Lambda function trigger.
   - Example : ```[{"LogGroupName":"group1"}, {"LogGroupName":"group2", "FilterPattern":"ERROR"},  {"LogGroupName":"group3", "FilterPattern":"INFO"}]```
 - `LoggingFirehoseStreamName` : Name of new Data Firehose Delivery Stream (must be unique per AWS account in the same AWS Region)
   - The default value will be `NewRelic-Logging-Delivery-Stream`
 - `LoggingS3BackupBucketName`: S3 Bucket Destination for failed events (must be globally unique across all AWS accounts in all AWS Regions within a partition)
   - The default value will be `firehose-logging-backup`
-- `EnableCloudWatchLoggingForFirehose`: Can either be `true` or `false` to enable CloudWatch logging for the Amazon Data Firehose stream.
+- `EnableCloudWatchLoggingForFirehose`: Can either be `true` or `false` to enable CloudWatch logging for the Amazon Data Firehose stream. Enabling logging can help in troubleshooting issues in pushing data through firehose stream. `false` by default
 - `NewRelicAccountId` : The New Relic Account ID to which the logs will be pushed
 - `CommonAttributes` : Common attributes to be added to all logs. This should be a JSON object.
   - Example : ```[{"AttributeName": "name1", "AttributeValue": "value1"}, {"AttributeName": "name2", "AttributeValue": "value2}]```
 - `StoreNRLicenseKeyInSecretManager` : Can either be `true` or `false` depending on which cloud formation stack decides whether to store your license key in the environment variables or to create a new secret in aws secrets manger.
+  - For this param `true` is default
 
 ## Building and packaging
 To build and package, follow these steps: