rewrite in go and add support for ipv6

public_ip.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"strings"
+)
+
+func GetPublicIP(version int8) string {
+	url := fmt.Sprintf("https://ipv%d.icanhazip.com", version)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Panic("Failed to get public IP: ", err)
+	}
+
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+
+	return strings.TrimSpace(string(body))
+}