Recognize that standalone requires whole directory

Nuitka creates the whole "NAME.dist" directory for a reason: it contains
not only the .exe but all of the shared libraries that it needs as well.
Remove old "ADD scripts scripts" from Dockerfile

Now that we have moved the Dockerfile down into the "output" directory
to minimize the size of the image that it needs to create, it no longer
needs to (nor can it) pull in the "scripts" directory.