improved README.md

Author: christiangda

README.md

@@ -1,8 +1,8 @@
 # aws_cloudwatch_exporter
 
-![Master branch workflow](https://github.com/slashdevops/aws_cloudwatch_exporter/workflows/Master%20branch%20workflow/badge.svg)
-![Docker Pulls](https://img.shields.io/docker/pulls/slashdevops/aws_cloudwatch_exporter.svg?maxAge=604800)
-
+[![Master branch workflow](https://github.com/slashdevops/aws_cloudwatch_exporter/workflows/Master%20branch%20workflow/badge.svg?branch=master)][github]
+[![Go Report Card](https://goreportcard.com/badge/github.com/slashdevops/aws_cloudwatch_exporter)](https://goreportcard.com/report/github.com/slashdevops/aws_cloudwatch_exporter)
+[![Docker Pulls](https://img.shields.io/docker/pulls/slashdevops/aws_cloudwatch_exporter.svg?maxAge=604800)][hub]
 
 Prometheus exporter for AWS CloudWatch