Unclear licensing

[qrpnxz]

I've submitted this project to the Free Software Directory. We surmise that the software is free (as in freedom) being licensed under GPL-3.0-or-later going by the package.json, (we recommend also specifying "or later" in the README,) but we have concerns about the files in src/assets. There is no additional licensing information for these, and in particular we have doubts about the fonts, that you have rights to license these under GPL.

This has not quite prevented the program from being listed, as it appears that the fonts may be substituted without issue, but it poses a problem for distribution.

Please clear up the licensing of the assets.