expressjs -> nextjs

nextjs/next.config.mjs

@@ -0,0 +1,25 @@
+/** @type {import('next').NextConfig} */
+const uploadMaxBytes = Number.parseInt(process.env.UPLOAD_MAX_BYTES || '0', 10);
+const actionBodySizeLimit = Number.isFinite(uploadMaxBytes) && uploadMaxBytes > 0
+  ? `${uploadMaxBytes}`
+  : '1gb';
+
+const nextConfig = {
+  poweredByHeader: false,
+  experimental: {
+    serverActions: {
+      bodySizeLimit: actionBodySizeLimit,
+    },
+  },
+  serverExternalPackages: ['sqlite3'],
+  async headers() {
+    return [
+      {
+        source: '/:path*',
+        headers: [{ key: 'X-Content-Type-Options', value: 'nosniff' }],
+      },
+    ];
+  },
+};
+
+export default nextConfig;