[ubuntu] SSL 갱신

※ SSL 갱신
1. 파일 업로드 
   /var/www/html/assets/upload/****_co_kr.crt
   /var/www/html/assets/upload/****_co_kr.key
2. 파일 이동
   mv /var/www/html/assets/upload/****_co_kr.crt /etc/nginx/ssl2021/****_co_kr.crt
   mv /var/www/html/assets/upload/****_co_kr.key /etc/nginx/ssl2021/****_co_kr.key
3. default ssl 경로 수정
   cd /etc/nginx/sites-available
   vi default
4. nginx, php7.2-fpm 재시작
   service nginx restart
   service php7.2-fpm restart