feat(logger): image without development libraries to reduce the size.

The size changes from 333 to 246 MB.
What I mean is that `logger/image/Dockerfile` should really be swapped with `logger/Dockerfile`. `publisher` follows that same pattern. The root Dockerfile is the build image (`deis/publisher-build`) and the Dockerfile in image/ is the final release artifact (`deis/publisher`). It's okay to change the existing structure if it means that we don't have to do things like the copy operations here.