make a folder a github repo code example
Example 1: github add directory to repository
git init
git add <folder1> <folder2> <etc.>
git commit -m "Your message about the commit"
git remote add origin https://github.com/yourUsername/yourRepository.git
git push -u origin master
git push origin master
Example 2: how to make a folder into git repo
$ git remote add origin git@github.com:username/new_repo
$ git push -u origin master