"It worked on my machine!" is not only said at runtime. It is as easily said during application build! A well-known solution for this is to create a Docker container image of your application. But what if the application will be run in an environment not supporting containers with required unit and quality validation tests? Let's see together how we can achieve this by picking and customizing the interesting bits of the common .NET Dockerfile to our needs. We'll do this from a developer's view, making sure the least amount of management and after-care is required.