我在虚拟主机上有一个域，在 Digital Ocean 上有一个子域。我正在尝试使用 traefik.toml 中的 acme 配置来注册 LetsEncrypt SSL 证书。
[acme]
email = "myemail@pirion.net"
storage = "acme.json"
entryPoint = "https"
OnHostRule = true
日志提供以下错误：
time="2018-01-12T03:25:37Z" level=debug msg="LoadCertificateForDomains [endpoint.pirion.net]..."
time="2018-01-12T03:25:37Z" level=debug msg="Look for provided certificate to validate [endpoint.pirion.net]..."
time="2018-01-12T03:25:37Z" level=debug msg="No provided certificate found for domains [endpoint.pirion.net], get ACME certificate."
time="2018-01-12T03:25:37Z" level=debug msg="Loading ACME certificates [endpoint.pirion.net]..."
time="2018-01-12T03:25:37Z" level=error msg="map[endpoint.pirion.net:[endpoint.pirion.net] acme: Could not determine solvers]"
time="2018-01-12T03:25:37Z" level=error msg="Error getting ACME certificates [endpoint.pirion.net] : Cannot obtain certificates map[endpoint.pirion.net:[endpoint.pirion.net] acme: Could not determine …