https://code.likeagirl.io/getting-started-with-sass-scss-972c266e96e7
https://blog.naver.com/thdbsgh3443/221350830475
https://blog.naver.com/sonmiheon/221517792281
https://stackoverflow.com/questions/51126403/you-dont-have-write-permissions-for-the-library-ruby-gems-2-3-0-directory-ma?rq=1
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https://blog.naver.com/thdbsgh3443/221350830475
https://blog.naver.com/sonmiheon/221517792281
https://stackoverflow.com/questions/51126403/you-dont-have-write-permissions-for-the-library-ruby-gems-2-3-0-directory-ma?rq=1