github_action github action practice references https://help.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions https://www.youtube.com/watch?v=uBOdEEzjxzE https://isntyet.github.io/deploy/github-action%EA%B3%BC-aws-code-deploy%EB%A5%BC-%EC%9D%B4%EC%9A%A9%ED%95%98%EC%97%AC-spring-boot-%EB%B0%B0%ED%8F%AC%ED%95%98%EA%B8%B0(2)/ https://www.notion.so/Github-Action-Deploy-ac95df239e844c17861b10dedfdc9734 https://gist.github.com/jypthemiracle/edf6e92ed10960f3ac2e94fc6fd21a20