몽고 SHELL
환경변수에 추가해주어야 한다.
책에 윈도우라면 mognod.exe로 실행하라고 했는데 안됨.
mongo 라고 치니 실행은 되는데 곧 deprecated 될 예정이라고...
Warning: the "mongo" shell has been superseded by "mongosh",
which delivers improved usability and compatibility.The "mongo" shell has been deprecated and will be removed in