Looking at the documentation, I got the impression that you give them Dockerfiles that they will run on GitHub servers for up to an hour at a time. Seems like

Looking at the documentation, I got the impression that you give them Dockerfiles that they will run on GitHub servers for up to an hour at a time. Seems like this would be pretty easy to abuse, and I was able to sign up with my free account. We'll have to see how long this lasts...