certbot 으로 tls 인증서 (ssl) 발급 하기

docker run --rm -it --name certbot \
    -v $(pwd)/example/etc:/etc/letsencrypt \
    -v $(pwd)/example/var:/var/lib/letsencrypt \
    certbot/certbot certonly \
    -d "example" \
    -d "*.example" \
    --manual \
    --preferred-challenges dns \
    --server https://acme-v02.api.letsencrypt.org/directory \
    -m admin@example