import fs npm istall @type/node https://www.te-nu.com/entry/2017/12/02/225022 tsconfig作成 npx tsc --init https://book.yyts.org/reference/tsconfig/tsconfig.json-settings#%E5%88%9D%E3%82%81%E3%81%A6%E3%81%AEtsconfigjson
