Using Docker to deploy Java Web Applications

Docker has fast become a favorite deployment format.  For those of you who haven't used Docker, Docker is "package once, run anywhere".  Docker does for software what shipping containers do for tangible goods.  It has standard connection mechanisms for disk and networking.  Additionally, it's easy to link Docker 'containers' together (eg link database Docker container with your application).
Advantages and Disadvantages
Not only is it a win for system administrators as it ma...