[Feature Request] Linked Docker Hub builds

**Feature Request**
Linked Docker Hub official builds

**Describe the feature request or bug**
Hello,

I maintain [Redcloud](https://github.com/khast3x/Redcloud), a small automated offensive infrastructure project that uses containers. I wish to add Covenant but it seems there are only [unofficial builds available](https://hub.docker.com/search?q=covenant&type=image).

ICYDK, you can link a Github account to Docker Hub for free and automatically build a public docker image when it detects a push. It would be really nice to have the certainty of using your official build rather than an unknown source when running tests and deployments.

Cheers!

**To Reproduce**
* Create Docker Hub Account
* Link Github Account
* Create Build for new repo
* Setup build for master branch

**Expected behavior**
An official container is built

**Additional context**
I am trying to get the infosec community to use docker more efficiently, you might see similar requests on my part to similar projects, thanks again!