slackとmailが送信されない
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slack
Failed to request: Post "https://hooks.slack.com/services/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": x509: certificate signed by unknown authority
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mail
Failed to send mail (x509: certificate signed by unknown authority)