참조
https://coding-groot.tistory.com/135
https://www.bearpooh.com/77
https://ratseno.tistory.com/6
https://yanacoding.tistory.com/4
https://1v1in.tistory.com/entry/%EA%B9%83%EB%9E%A9GitLab-%ED%94%84%EB%A1%9C%EC%A0%9D%ED%8A%B8-%EC%83%9D%EC%84%B1%EA%B8%B0%EC%A1%B4-%EC%9E%91%EC%97%85%ED%8F%B4%EB%8D%94-%EC%97%B0%EA%B2%B0
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