Plain js files are not copied to the public folder

I would like to move my website from hakyll to spike. I have some js-files from a wrapbootstrap-theme who are not copied to the output folder. What am I missing/doing wrong?

The code is at https://github.com/obcode/ob.cs.hm.edu/tree/spike.

I have started with spike new using the default template.

Files which are not copied are found in assets/js and assets/cubeportfolio/js.

The file assets/js/app.js is referenced from withing views/layout.sgr.

Can anyone give me some help, please.