next.config.mjs

// next.config.js
import nextMDX from "@next/mdx";
import remarkGfm from "remark-gfm";
import remarkMath from "remark-math";
import rehypeKatex from "rehype-katex";

const withMDX = nextMDX({
  extension: /\.mdx?$/,
  options: {
    // If you use remark-gfm, you'll need to use next.config.mjs
    // as the package is ESM only
    // https://github.com/remarkjs/remark-gfm#install
    remarkPlugins: [remarkGfm, remarkMath],
    rehypePlugins: [rehypeKatex],
    // If you use `MDXProvider`, uncomment the following line.
    // providerImportSource: "@mdx-js/react",
  },
})

/** @type {import('next').NextConfig} */
const nextConfig = {
  // Configure pageExtensions to include md and mdx
  pageExtensions: ['ts', 'tsx', 'js', 'jsx', 'md', 'mdx'],
  // Optionally, add any other Next.js config below
  reactStrictMode: true,
}

// Merge MDX config with Next.js config
export default withMDX(nextConfig);