How to set up ports in vagrant + golang so that the host machine's browser opens?

Question

go

Hello everyone, I can't open a go application in the browser on the host machine.
That is, I prescribe, for example, on the guest machine:
http.ListenAndServe("localhost:3000", nil)
In the vagrant config:
config.vm.network "forwarded_port", guest: 3000, host: 30
That is, the site should be accessible on the host machine at / localhost: 30 ?? But that doesn't work. Or how to set up, please tell me.

Answer 1

Ports up to 1000 require superuser rights.