필요한 이유 : local-server의 인증서문제 및 Cookie https

1. windows powershell에서 Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1')) 입력
2. choco로 install 되었는지 확인
3. choco install mkcert
4. frontend foler → terminal → mkcert -install mkcert localhost 127.0.0.1 ::1
5. package.json -> scripts -> start set HTTPS=true&&set SSL_CRT_FILE=localhost+2.pem&&set SSL_KEY_FILE=localhost+2-key.pem&&react-scripts start→crt file이랑 key file 이름은 만들어진 파일명 똑같이