如何从golang-api服务器文件夹获取图像URL

I have images folder in golang-api project and I want get an image url.

I tried by

http.Handle("/resources/", http.StripPrefix("/resources/", http.FileServer(http.Dir("resources"))))

And I call url:

localhost:3000/resources/[images-name]

but I received 404 error when I call the url