No public git folder

I have setup sparkleshare-dashboard and added repository in config like this

exports.folders = [
  { type: 'git', name: 'Public GIT folder', path: 'C:/Users/DELL/SparkleShare/test4/.git', pub: true }
];

And then i link the device by adding host address "https://github.com" and link code,generated by sparkle-share dashboard but i it show only blank screen on android side.  
