Add Docker badge

Author: AndrewJo

README.md

@@ -1,8 +1,13 @@
 # docker-helm
 
+[![Image Version][docker-image-version-badge]][docker-hub-repo]
+[![Image Size][docker-image-size-badge]][docker-hub-repo]
 [![Build Status][circleci-badge]][circleci-url]
 
 A minimal container image that includes helm and kubectl binaries.
 
+[docker-image-version-badge]: https://img.shields.io/docker/v/verdigristech/helm?sort=semver
+[docker-hub-repo]: https://hub.docker.com/r/verdigristech/helm
+[docker-image-size-badge]: https://img.shields.io/docker/image-size/verdigristech/helm?sort=semver
 [circleci-badge]: https://img.shields.io/circleci/token/f41a8ea8d8fe8a47d6d409f60f53230c8c21ff67/project/github/VerdigrisTech/docker-helm/master.svg?logo=circleci
 [circleci-url]: https://circleci.com/gh/VerdigrisTech/docker-helm