fix: cors refactor

@@ -188,6 +188,7 @@ func AllowCors() func(ctx *context.Context) {
 		ctx.Output.Header("Access-Control-Allow-Headers", "*")
 		ctx.Output.Header("Access-Control-Allow-Headers", "*")
 		ctx.Output.Header("Access-Control-Allow-Credentials", "true")
 		ctx.Output.Header("Access-Control-Allow-Credentials", "true")
 		ctx.Output.Header("Access-Control-Allow-Origin", "*") //origin
 		ctx.Output.Header("Access-Control-Allow-Origin", "*") //origin
+		ctx.Output.Header("Access-Control-Allow-Private-Network","true")
 		if ctx.Input.Method() == http.MethodOptions {
 		if ctx.Input.Method() == http.MethodOptions {
 			// options请求，返回200
 			// options请求，返回200
 			ctx.Output.SetStatus(http.StatusOK)
 			ctx.Output.SetStatus(http.StatusOK)