投放JS文件时出错

I have this directory structure

src/
  github.com/
    john/
      site/
        main.go
        templates/
          index.html
        static/
          js/
            site.js
          css/

In my main.go:

func main() {
  http.Handle("/templates/", http.StripPrefix("/templates/", http.FileServer(http.Dir(filepath.Join(cwd, "/github.com/john/site/templates/"))))
  http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir(filepath.Join(cwd, "/github.com/john/site/static/"))))

In index.html

<script src="/static/js/site.js"></script>

The HTML loads properly. However, no such js file was found. Why is that so?

I run go install within the src directory. Also, when I try to access localhost:3000/templates/index.html, the file is not found either.

js folder is not under static. it should be like

static/
      js/
        site.js