获取https：// <mydomain.com> / translate / 2327496366232：x509：未知授权机构签名的证书”

In my Go App, I make a call to Hostname+"/translate/12345

Thing is depending the environment, in local Hostname will be on http, and in production, it will be on https

When I test the production route on https with postman, there is no problem, route works fine.

But when I run it from WS, I get:

Get https://<mydomain.com>/translate/2327496366232: x509: certificate signed by unknown authority"

Here is my code:

var terID string
client := http.Client{}
req, err := http.NewRequest("GET", Hostname+"/translate/"+terID, nil)
if err != nil {
    return "", err
}
req.SetBasicAuth(Username, Password)
res, err := client.Do(req)
if err != nil {
    return "", err
}

What can I do to fix that ?