Add chart prerequisites and icon

charts/flagger/Chart.yaml

@@ -2,5 +2,16 @@ apiVersion: v1
 name: flagger
 version: 0.1.2
 appVersion: 0.1.2-alpha.0
+kubeVersion: ">=1.9.0-0"
+engine: gotpl
 description: Flagger is a Kubernetes operator that automates the promotion of canary deployments using Istio routing for traffic shifting and Prometheus metrics for canary analysis.
-home: https://github.com/stefanprodan/flagger
+home: https://flagger.app
+icon: https://raw.githubusercontent.com/stefanprodan/flagger/master/docs/logo/flagger-icon.png
+sources:
+- https://github.com/stefanprodan/flagger
+maintainers:
+- name: stefanprodan
+  url: https://github.com/stefanprodan
+keywords:
+- canary
+- istio

charts/flagger/README.md

@@ -1,11 +1,20 @@
 # Flagger
 
 [Flagger](https://flagger.app) is a Kubernetes operator that automates the promotion of canary deployments
-using Istio routing for traffic shifting and Prometheus metrics for canary analysis.
+using Istio routing for traffic shifting and Prometheus metrics for canary analysis. 
+Flagger implements a control loop that gradually shifts traffic to the canary while measuring key performance indicators
+like HTTP requests success rate, requests average duration and pods health.
+Based on the KPIs analysis a canary is promoted or aborted and the analysis result is published to Slack.
+
+## Prerequisites
+
+* Kubernetes >= 1.9
+* Istio >= 1.0
+* Prometheus >= 2.6
 
 ## Installing the Chart
 
-Add Flagger Hel repository:
+Add Flagger Helm repository:
 
 ```console
 helm repo add flagger https://flagger.app