feat(provider): added ip6.me

Signed-off-by: Mario-F <github@fritschen.net>

internal/providers/ip6me.go

@@ -0,0 +1,46 @@
+package providers
+
+import (
+	"io/ioutil"
+	"net/http"
+
+	"github.com/Mario-F/hetzner-dyndns/internal/logger"
+	"github.com/Mario-F/hetzner-dyndns/internal/network"
+)
+
+func ip6meGetIP() (string, error) {
+	logger.Debugf("Start GetIP with ip6me")
+
+	resp, err := http.Get("http://ip6only.me/api/")
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != 200 {
+		return "", errResponseNotOK
+	}
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	ip, err := captureIPv6(string(body))
+	if err != nil {
+		return "", err
+	}
+	if ip == "" {
+		return "", errIPNotFound
+	}
+	logger.Debugf("Found IP with ip6me: %+v\n", ip)
+	return ip, nil
+}
+
+var ip6meProvider Provider = Provider{
+	GetIP:        ip6meGetIP,
+	Version:      network.IPv6,
+	ProviderName: "ip6me",
+}
+
+func init() {
+	ProviderList = append(ProviderList, ip6meProvider)
+}