import os from "node:os";

const localNetworkHosts = Object.values(os.networkInterfaces())
  .flat()
  .filter((address) => address && address.family === "IPv4" && !address.internal)
  .map((address) => address.address);

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  // Next.js protects development assets with an origin allowlist. Detect the
  // machine's current LAN addresses at startup so no local IP is hard-coded.
  allowedDevOrigins: localNetworkHosts,
};

export default nextConfig;