Automated image builds for new commits/tags

[laugmanuel]

Please describe the problem you have [A clear, concise, description of the problem you are facing. What is the problem that feature X would solve for you?] Currently, it seems that everything needed to build this project is present but the official image is about one year old. I would propose that:

• the image gets rebuild whenever there is a change to the code -> tag latest
• tagged to a version whenever a Git tag is created

That way, a user would be able to test (and potentially use) the latest features without the need to do a custom build / manage the hosting of the custom image.

[stevesloka]

This a great idea @laugmanuel! We can work to get this matching how we do it in other repos.