Can you add a license file?
I guess I can, but I am not a lawyer and I don't really want to go on date with Gaben and his lawyers (date with Gabe, gooseman and Jess is ok for me), but if you have any suggestions please share
source code is all written from scratch and it is free for anybody
If you want the code to stay free you better add a free software license, that's what these licenses are made for, to preserve the freedom of the code. Otherwise others can take your code and make it propietary and add their propietary license to it.