Imports github.com/go-acme/lego/v4/acme github.com/go-acme/lego/v4/acme/api github.com/go-acme/lego/v4/challenge github.com/go-acme/lego/v4/platform/wait github.com/miekg/dns github.com/sirupsen/logrus Standard library imports bufio crypto/sha256 encoding/base64 errors fmt net os strconv strings sync time