const express = require("express"); const { join: joinPath } = require("path"); const app = express(); app.use(express.json()); app.use(express.static("public")); app.get("/data.json", (_req, res) => { res.sendFile(joinPath(__dirname, "build/data.json")); }); app.listen( Number(process.env["PORT"] ?? 8080), function () { return console.log(`listening on ${this.address().port}`); } );