x509: certificate signed by unknown authority (Win10)

[WillianBR]

I'm running the examples.go on Windows 10 64-bit (Git Bash), but it always fail with panic:

$ go run examples.go
panic: failed to request CA certificates: Get "https://testrfc7030.com:8443/.well-known/est/cacerts": x509: certificate signed by unknown authority

goroutine 1 [running]:
main.panicOnError(...)
        C:/Users/Willian/go/src/github.com/thales-e-security/estclient/examples/examples.go:80
main.main()
        C:/Users/Willian/go/src/github.com/thales-e-security/estclient/examples/examples.go:44 +0x813
exit status 2

It's just into the call:

cacerts, err := client.CaCerts()

How I can tell GOLang to use the local file dstcax3.pem?

If I do the call with curl, giving the dstcax3.pem, it works!