use fallback if not x-forwarded-for is present

utils/utils.go

@@ -815,3 +815,11 @@ func PlayerFromSteam(players []*ent.Player, db *ent.Client, apiKey string, rl *r
 
 	return nPlayers, nil
 }
+
+func RealIP(header *http.Header, fallback string) string {
+	if header.Get("X-Forwarded-For") != "" {
+		return header.Get("X-Forwarded-For")
+	} else {
+		return fallback
+	}
+}