server.js

const fs = require("fs");
const path = require("path");
const express = require("express");
const app = express();

const port = 3000;

const requestDataFromFile = (result, filepath) => {
  const file = path.join(__dirname, filepath);

  if (fs.existsSync(file)) {
    result.json(JSON.parse(fs.readFileSync(file, "utf8")));
  } else {
    result.status(404).json({
      error: {
        status: 404,
        message: "Not Found",
      },
    });
  }
};

app.use(express.static("dist"));

app.use("/static", express.static("static"));

app.get("/api/device/list", (_, result) => {
  requestDataFromFile(result, "data/list.json");
});

app.get("/api/device/:id", (request, result) => {
  setTimeout(() => {
    requestDataFromFile(result, `data/${request.params.id}.json`);
  }, Math.random() * 1000);
});

app.listen(port, () =>
  /* eslint-disable no-console */
  console.log(`Sample App listening at http://localhost:${port}`)
);