[nginx] 접근 제한
https://minholee93.tistory.com/entry/Nginx-Basic-Auth https://sangchul.kr/entry/%EB%A6%AC%EB%88%85%EC%8A%A4-nginx-ip-%EC%A0%9C%ED%95%9C%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95 https://www.kyrandia.net/2012/03/nginx-htaccess.html https://mail.bada-ie.com/board/view/?page=3&uid=1313&category_code=jvYw%7C%7CJCpJ%7C%7C&code=all&key=&keyfield= 우분투에서 htpasswd 사용하기 위해 설치 apt-get install apache2-utils