Update main.go

main.go

@@ -331,7 +331,7 @@ func forwardToSider(w http.ResponseWriter, r *http.Request) {
 	if resp.StatusCode != http.StatusOK {
 		fmt.Printf("导致%d错误的请求体: %s\n", resp.StatusCode, string(finalBody))
 		fmt.Printf("请求Headers: %+v\n", req.Header)
-		http.Error(w, fmt.Sprintf("Sider服务返回错误: %d", resp.StatusCode), resp.StatusCode)
+		http.Error(w, fmt.Sprintf("Sider服务返回错误: %d - %s", resp.StatusCode, string(bodyBytes)), resp.StatusCode)
 		return
 	}