fix: ionos API content-type

pkg/dnsProvider/ionos/api/ionosAPI.go

@@ -83,6 +83,8 @@ func (i *IonosAPIImpl) HttpCall(method string, url string, body io.Reader) (*htt
 	}
 
 	req.Header.Add("X-API-Key", i.APIKey)
+	req.Header.Add("Content-Type", "application/json")
+	req.Header.Add("Accept", "application/json")
 
 	return i.HTTPClient.Do(req)
 }
@@ -121,10 +123,10 @@ func (i *IonosAPIImpl) GetRecordId(zoneId string, tld string, subdomain string,
 	json.Unmarshal(responseBody, &zone)
 
 	var domain string
-	if subdomain != "" {
-		domain = subdomain + "." + tld
-	} else {
+	if subdomain == "@" || subdomain == "" { 
 		domain = tld
+	} else {
+		domain = subdomain + "." + tld
 	}
 
 	for _, record := range zone.Records {
@@ -162,12 +164,14 @@ func (i *IonosAPIImpl) SetARecord(tld string, subdomain string, ip net.IP, ttl i
 		return nil, err
 	}
 
+	responseBody := make([]byte, res.ContentLength)
+	res.Body.Read(responseBody)
+
 	if res.StatusCode != 200 {
 		return nil, errors.New("error updating record")
 	}
 
-	responseBody := make([]byte, res.ContentLength)
-	res.Body.Read(responseBody)
+	
 
 	changeRecord := ChangeRecord{}
 	json.Unmarshal(responseBody, &changeRecord)