SupleCost/next.config.ts at main · Varun79-python/SupleCost · GitHub

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import type { NextConfig } from "next";

const csp = [
  "default-src 'self'",
  "script-src 'self' 'unsafe-eval' 'unsafe-inline'",  // Next.js requires eval for dev, inline for chunks
  "style-src 'self' 'unsafe-inline'",                  // Tailwind + framer-motion inline styles
  "img-src 'self' data: blob: https://*.supabase.co https://m.media-amazon.com https://logo.clearbit.com https://*.hkrtcdn.com",
  "font-src 'self' data: https://fonts.gstatic.com",
  "connect-src 'self' https://*.supabase.co https://*.upstash.io",
  "frame-ancestors 'self'",
  "base-uri 'self'",
  "form-action 'self'",
].join("; ");

const securityHeaders = [
  { key: "X-DNS-Prefetch-Control", value: "on" },
  { key: "Strict-Transport-Security", value: "max-age=63072000; includeSubDomains; preload" },
  { key: "X-Frame-Options", value: "SAMEORIGIN" },
  { key: "X-Content-Type-Options", value: "nosniff" },
  { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
  { key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=(), interest-cohort=()" },
  { key: "Content-Security-Policy", value: csp },
];

const nextConfig: NextConfig = {
  // ── Vercel Remote Caching ─────────────────────────────────────
  // Using default in-memory cache for stability.
  // ISR will not persist across deployments without a remote cache.
  // cacheHandler: process.env.VERCEL ? "./cache-handler.mjs" : undefined,
  // cacheMaxMemorySize: 0,

  // ── Incremental Static Regeneration ──────────────────────────
  // Static pages revalidate on demand (no build-time generation).
  // Fresh data = stale-while-revalidate pattern via the ISR cache.
  experimental: {
    // Disable persistent cache to avoid stale compiled output during dev
    turbopackFileSystemCacheForDev: false,
  },

    images: {
    remotePatterns: [
      { protocol: "https", hostname: "m.media-amazon.com" },
      { protocol: "https", hostname: "logo.clearbit.com" },
      { protocol: "https", hostname: "*.media-amazon.com" },
      { protocol: "https", hostname: "img8.hkrtcdn.com" },
      { protocol: "https", hostname: "img6.hkrtcdn.com" },
      { protocol: "https", hostname: "*.hkrtcdn.com" },
      { protocol: "https", hostname: "*.supabase.co" },
    ],
    formats: ["image/avif", "image/webp"],
    minimumCacheTTL: 86400,
  },
  async headers() {
    return [
      {
        source: "/(.*)",
        headers: securityHeaders,
      },
      {
        source: "/sw.js",
        headers: [
          { key: "Content-Type", value: "application/javascript" },
          { key: "Cache-Control", value: "no-cache, no-store, must-revalidate" },
          { key: "Service-Worker-Allowed", value: "/" },
        ],
      },
      {
        source: "/manifest.json",
        headers: [
          { key: "Content-Type", value: "application/manifest+json" },
          { key: "Cache-Control", value: "public, max-age=3600" },
        ],
      },
    ];
  },
  compress: true,
  poweredByHeader: false,
};

export default nextConfig;