After adding the json data the question and hint are not loading in /cards

const express = require("express");
const router = express.Router();
const {data} = require("../data/flashcardData");
const {cards} = data;

router.get("/", (req, res) => {  
  res.render("card", {    
    prompt: cards[0].question,
    hint: cards[0].hint
  });
});

module.exports = router;

extends layout.pug

block content
  section#content
    h2= prompt
    if hint
      p
        i Hint: #{hint}

const express = require("express");
const router = express.Router();

router.get("/", (req, res) => {
  const name = req.cookies.username;
  if (name) {
    res.render("index", {name: name});    
  } else {
    res.redirect("/hello");
  }
});

router.post("/goodbye", (req, res) => {
  res.clearCookie("username");
  res.redirect("/hello");
})

router.get("/cards", (req, res) => {
  res.render("card");
});

router.get("/hello", (req, res) => {
  const name = req.cookies.username;
  if (name) {
    res.redirect("/");
  } else {
    res.render("hello");
  }
});

router.post("/hello", (req, res) => {
  res.cookie("username", req.body.username);
  res.redirect("/",);
});

module.exports = router;

const express = require("express");
const bodyParser = require("body-parser");
const cookieParser = require("cookie-parser");

const app = express() // returns express app

app.use(bodyParser.urlencoded({extended: false}));
app.use(cookieParser());

app.set("view engine", "pug"); // enable pug

const mainRoutes = require("./routes");
const cardRoutes = require("./routes/cards");

app.use(mainRoutes);
app.use("/cards", cardRoutes);

app.use((req, res, next) => {
  console.log("one!");
  next();
});

app.use((req, res, next) => {
  console.log("two!");
  next();
});

app.use((req, res, next) => {
  const err = new Error("Not found");
  err.status = 404;
  next(err);
});

app.use((err, req, res, next) => {
  res.locals.error = err;
  res.status(err.status);
  res.render("error");
});

app.listen(3000, () => {
  console.log("The application is running on localhost:3000");
})// setup server