如何将HTTP服务部署在TCP4而非TCP6上？

我使用https://github.com/gin-gonic/gin 来编写一个 http 服务，但是当我部署它的时候，它一直部署在 tcp6上(根据 netstat)：

r := gin.Default()
//none of these are working , It keeps being listed on tcp6
r.Run(":8080")
r.Run("*:8080")
r.Run("0.0.0.0:8080")

The documentation states

Run attaches the router to a http.Server and starts listening and serving HTTP requests. It is a shortcut for http.ListenAndServe(addr, router)

You can start the server directly using an http.Server the same way the http package does in ListenAndServe

server := &http.Server{Handler: r}
l, err := net.Listen("tcp4", addr)
if err != nil {
    log.Fatal(err)
}
err = server.Serve(l)
// ...