Update roadmap and readme

docs/gitbook/README.md

@@ -26,7 +26,7 @@ This project is sponsored by [Weaveworks](https://www.weave.works/)
 To get started with Flagger, chose one of the supported routing providers
 and [install](install/flagger-install-on-kubernetes.md) Flagger with Helm or Kustomize.
 
-After install Flagger you can follow one the tutorials:
+After install Flagger, you can follow one of the tutorials:
 
 **Service mesh tutorials**
 
@@ -45,4 +45,3 @@ After install Flagger you can follow one the tutorials:
 * [Istio](https://github.com/stefanprodan/gitops-istio)
 * [Linkerd](https://helm.workshop.flagger.dev)
 * [AWS App Mesh](https://eks.hands-on.flagger.dev)
-

docs/gitbook/usage/metrics.md

@@ -235,18 +235,17 @@ Reference the template in the canary analysis:
 ```
 
 
-### AWS CloudWatch metrics
+### Amazon CloudWatch
 
-You can create custom metric checks using the AWS CloudWatch metrics provider.
+You can create custom metric checks using the CloudWatch metrics provider.
 
-The template example:
+CloudWatch template example:
 
 ```yaml
 apiVersion: flagger.app/v1alpha1
 kind: MetricTemplate
 metadata:
   name: cloudwatch-error-rate
-  namespace: istio-system
 spec:
   provider:
     type: cloudwatch
@@ -299,20 +298,19 @@ spec:
     ]
 ```
 
-where the query is in the form as in [the AWS' official document](https://aws.amazon.com/premiumsupport/knowledge-center/cloudwatch-getmetricdata-api/).
+The query format documentation can be found [here](https://aws.amazon.com/premiumsupport/knowledge-center/cloudwatch-getmetricdata-api/).
 
 Reference the template in the canary analysis:
 
 ```yaml
   analysis:
     metrics:
-      - name: "cw custom error rate"
+      - name: "app error rate"
         templateRef:
           name: cloudwatch-error-rate
-          namespace: istio-system
         thresholdRange:
           max: 0.1
         interval: 1m
 ```
 
-Please note that the flagger need AWS IAM permission to perform `cloudwatch:GetMetricData` to use this provider.
+**Note** that Flagger need AWS IAM permission to perform `cloudwatch:GetMetricData` to use this provider.