import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  // Standalone output: the frontend image runs `node server.js` from
  // distroless with no node_modules — required for the air-gapped bundle.
  output: "standalone",
  // The service worker must never be cached: a stale sw.js (e.g. Cloudflare's
  // default 4h Browser Cache TTL) delays update detection, so a new deploy's
  // auto-reload never fires and users stay on the old build. Force revalidation
  // so the browser always re-checks sw.js and picks up new versions at once.
  async headers() {
    return [
      {
        source: "/sw.js",
        headers: [{ key: "Cache-Control", value: "no-cache, no-store, must-revalidate" }],
      },
    ];
  },
};

export default nextConfig;