The repository currently lacks a license and falls under some form of copyright in many jurisdictions as a default. I would personally suggest using a more open license, such as GPLv3, to promote free software, however the choice of license is ultimately up to the developers of the code.
Regardless of which license is desired, I would recommend adding it explicitly to the repository to remove any legal ambiguity.
The repository currently lacks a license and falls under some form of copyright in many jurisdictions as a default. I would personally suggest using a more open license, such as GPLv3, to promote free software, however the choice of license is ultimately up to the developers of the code.
Regardless of which license is desired, I would recommend adding it explicitly to the repository to remove any legal ambiguity.