@stefko Ah! I didn't get to the end of the survey: I don't even go past the first page without a mention of CC BY. ;)
Yes, you can use https://zenodo.org/ (more advice at https://cyber.harvard.edu/hoap/?title=How_to_make_your_own_work_open_access&oldid=9356#Deposit_in_an_OA_repository_(%22green%22_OA%29 ).
@nemobis Thank you! I published my code with CC BY now :)