Cannot run Dot net core preview project on Docker

Question

I have just created a web application with the latest .Net Core Preview sdks. I am trying to run it on Linux Docker however the project does not build.
The error I am re

Answer 1

When you get this error you should take a look at Output -> Docker, usually it shows what is the problem. It could be that container you are trying to overwrite is running. Or some other configuration problem.

By reading Docker Output you should be able to quickly deduce what is the problem and fix it. Too bad that Visual Studio doesn't instruct you to do this, but for now only give this generic The DOCKER_REGISTRY variable is not set error.