Surplus static files being served

[flawmop]

Low priority, but there seems to be over 1Mb of javascript appearing in https://cardiac.nottingham.ac.uk/ActionPotentialPortal/static/js/ (e.g. files like https://cardiac.nottingham.ac.uk/ActionPotentialPortal/static/js/lib/flotcharts/jquery.canvaswrapper.js).

As we're using main-min.js there doesn't seem much point in putting them (and package.json, gulpfile.js, npm-shrinkwrap.json, etc) in the container and serving them.