controller.go

package controllers

import (
	"github.com/astaxie/beego"
	"io/ioutil"
)

type MainController struct {
	beego.Controller
}

func (this *MainController) Get() {
	// Cheap little hack to get index.html to display for "/"
	content, err := ioutil.ReadFile("static/index.html")
	if err != nil {
		panic(err)
	}

	this.Ctx.Output.Header("Content-Type", "text/html; charset=utf-8")
	this.Ctx.Output.Body(content)
	this.RenderBytes()
}

main.go

package main

import (
	"FrontEnd/controllers"
	"github.com/astaxie/beego"
)

func main() {
	beego.Router("/", &controllers.MainController{})
	for _, path := range []string{"css","js","img"} {
		beego.SetStaticPath("/"+path, "static/"+path)
	}
	beego.Run()
}