actions/configure-pages@v5 was improperly injecting next.config.js …

…data when wrapped by the `withMdx`

.github/workflows/gh-pages-nextjs.yml

@@ -18,6 +18,9 @@ permissions:
   pages: write
   id-token: write
 
+env:
+  BASE_PATH: /aixb-landing-page
+
 # Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
 # However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
 concurrency:
@@ -55,12 +58,6 @@ jobs:
           cache: ${{ steps.detect-package-manager.outputs.manager }}
       - name: Setup Pages
         uses: actions/configure-pages@v5
-        with:
-          # Automatically inject basePath in your Next.js configuration file and disable
-          # server side image optimization (https://nextjs.org/docs/api-reference/next/image#unoptimized).
-          #
-          # You may remove this line if you want to manage the configuration yourself.
-          static_site_generator: next
       - name: Restore cache
         uses: actions/cache@v4
         with:

next.config.js

@@ -2,5 +2,7 @@ const withMDX = require('@next/mdx')({
   extension: /\.mdx?$/,
 })
 module.exports = withMDX({
+  output: 'export',
+  basePath: process.env.BASE_PATH ?? '',
   pageExtensions: ['js', 'jsx', 'ts', 'tsx', 'md', 'mdx'],
 })