udpate the top level README (#46)

Author: mbaijal

README.md

@@ -24,3 +24,11 @@ You can also learn more about our [Governance](/GOVERNANCE.md) structure.
 ## License
 
 This project is [licensed](/LICENSE) under the Apache-2.0 License.
+
+## Supported ApplicationAutoscaling Resources
+For a list of supported resources, refer to the [ApplicationAutoscaling API Reference](https://aws-controllers-k8s.github.io/community/reference/).
+
+Find the helm charts and controller images on Amazon ECR Public Gallery.
+- Helm Chart: https://gallery.ecr.aws/aws-controllers-k8s/applicationautoscaling-chart
+
+- Controller Image: https://gallery.ecr.aws/aws-controllers-k8s/applicationautoscaling-controller