can't connect to remote device

[yuancpfive]

Hi,
I run your code and get some problems.
I run "npm run serve" in cmd, and run main.go in cmd . broswe in 127.0.0.1:8080, I get the view,
but after I change "资产Host" to my target windows' ip, such as 192.168.199.101, the browser notice me that waiting and final connect fail.
How do I do ?