提供CSS时，在Golang中出现MIME类型（“文本/纯文本”）错误

I am building my first Go web project and I am getting this error on the browser console when I load my page

Refused to apply style from 'http://localhost:8080/static/css/processor-auth.css' because its MIME type ('text/plain') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

I am not sure what I am doing wrong because I have already added this code to load the static files

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

This is how my main.go file looks like:

 package main

import(
    "net/http"
    "os"
    "html/template"

    "github.com/julienschmidt/httprouter"
)


// Auth struct handler
type auth struct{}

func (auth *auth) ServeHTTP(w http.ResponseWriter, r *http.Request){
    wd,_:= os.Getwd()
    t := template.Must(template.ParseFiles(wd+"/templates/processor/auth.html"))
    err:=t.Execute(w,nil)

    if err !=nil{
        http.Error(w,"Could not execute template",500)
    }

}


func main(){

    router:= httprouter.New()
    // set the static files
    http.Handle("/static/",http.StripPrefix("/static/",http.FileServer(http.Dir("static"))))

    router.Handler("GET","/auth",&auth{})

    server := http.Server{
        Addr:"127.0.0.1:8080",
        Handler:router,
    }

    server.ListenAndServe()
}

Edit: Solved the issue

Since I was using httprouter as my multiplexer I could not use

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

I had to update to the httprouter's ServeFiles function and update the code to router.ServeFiles("/static/*filepath",http.Dir("static"))