git init@

git init
git add .
git commit -m "first commit"
git remote add origin https://github.com/<GitHub아이디>/<저장소이름>.git
get remote add origin git@github.com:bird79/test.git
git push -u origin master

git commit

git add .
git commit -m "message"
git push -u origin master

git ssh

ssh-keygen -t rsa -C "your_email@example.com"
eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa
<GitHub 설정 후>
ssh -T git@github.com

GitHub > setting > ssh key

create-react-app

create-react-app <project>
cd <project>
vi .env

#########
PORT=8080
#########

npm start