아래 링크 참조
master 생성
https://velog.io/@blair-lee/VSCode에서-Github-업로드하는-방법짱쉬움ㅋㅋ
branch 활용
https://velog.io/@thguss/%EA%B9%83%ED%97%99-Pull-Request-VS-Code-%EC%97%B0%EB%8F%99
