Assume that your application is in a directory called homework, so that you have homework/app, etc, as directories.
To submit your code proceed as follows.
The drawback of this method is that you may end up with a fairly large zip file, and the zip file will contain also your .git directory.
homework.homework.zip . The command zips all files, minus the build files, which take up a lot of space and are not needed. zip -r homework homework -x@exclude.lsthomework.zip to CrowdGrader.