Simplify deploying js/css

[stefanloerwald]

This change adds a powershell script and a Dockerfile to help deploy js/css static assets on a machine without npm.

How it works:

• when the docker container is built, it creates the up-to-date resources. Changes to any file will trigger a rebuild.
• the resources are then essentially just copied out of the image, overwriting the files in the dist folder.

The main advantage of this approach is that the deploy step doesn't require setting up npm anymore (and one doesn't have to worry about environments, as it's a fresh environment). Of course that's traded against the requirement of docker + powershell (a similar bash script would be very easy to add, if some developers are unix-based).

[lindespang]

Cool addition, do you mind persisting this "How-to" text somewhere? Maybe in the wiki where the NPM info is?

Also please change base to develop branch! (On mobile cant see the control to change it myself)

[stefanloerwald]

Updated. Thanks for the quick response, @lindespang

[lindespang]

Thanks for your contribution!