安装ACME
curl https://get.acme.sh | sh -s email=my@example.com申请证书
acme.sh --issue --dns -d *.example.com --yes-I-know-dns-manual-mode-enough-go-ahead-please验证解析记录
host -t txt _acme-challenge.example.com自测通过后签发证书
acme.sh --renew --dns -d *.example.com --yes-I-know-dns-manual-mode-enough-go-ahead-please