Slow initial load when deployed to Vercel

export default defineConfig({
  plugins: [
    tailwindcss(),
    // Enables Vite to resolve imports using path aliases.
    tsconfigPaths(),
    tanstackStart({
      router: {
        // Specifies the directory TanStack Router uses for your routes.
        routesDirectory: 'app', // Defaults to "routes", relative to srcDirectory
      },
      srcDirectory: 'src', // This is the default
    }),
    // Generates locally-trusted SSL certificates for HTTPS in development
    // Required for cross-site cookies (sameSite: 'none', secure: true) to work
    ...(process.env.NODE_ENV === 'development' ? [mkcert()] : [nitro()]),
    viteReact({
      babel: {
        plugins: ['babel-plugin-react-compiler'],
      },
    }),
  ],
  server: {
    port: 3001,
  },
  ssr: {
    // Bundle these packages during SSR so Vite can handle CSS imports
    noExternal: ['@platejs/math', 'katex'],
  },
})