server.js

import http from "node:http";
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const PUBLIC = path.join(__dirname, "public");
const PORT = Number(process.env.PORT) || 7860;

const MIME = {
  ".html": "text/html",
  ".js": "text/javascript",
  ".css": "text/css",
};

const server = http.createServer((req, res) => {
  const urlPath = decodeURIComponent(new URL(req.url, "http://localhost").pathname);
  let filePath = path.join(PUBLIC, urlPath === "/" ? "index.html" : urlPath);
  if (!filePath.startsWith(PUBLIC)) {
    res.writeHead(403).end("Forbidden");
    return;
  }
  fs.readFile(filePath, (err, data) => {
    if (err) {
      res.writeHead(404).end("Not found");
      return;
    }
    res.writeHead(200, { "Content-Type": MIME[path.extname(filePath)] || "application/octet-stream" });
    res.end(data);
  });
});

server.listen(PORT, "0.0.0.0", () => {
  console.log(`Server listening on port ${PORT}`);
});