I have tried many times and search a lot but I can't solve it.referenced CSS failure?why? :         enter code here// a small demo to exercise
    var express = require("express");
    var app = express();
    var bodyparser = require("body-parser");
    
    app.use("/public/", express.static("./public/"));
    app.use("/node_modules/",express("./node_modules/"));
    app.use(bodyparser.urlencoded({ extended: false }));
    app.use(bodyparser.json());
    //app.set
    app.engine("html", require("express-art-template"));
    app.get("/index", function (request, response) {
        response.render("index.html");
    });
    app.listen(9000, function () {
        console.log("server is running!!");
    });


 I met a problem. The below picture is what problem I met.
[![enter image description here][1]][1]

 Here is my index.html
[![enter image description here][2]][2]

 Here is my resources folders
[![enter image description here][3]][3]


  [1]: https://i.stack.imgur.com/eyWLm.png
  [2]: https://i.stack.imgur.com/G0pLT.png
  [3]: https://i.stack.imgur.com/3pcfL.png