build(site): add Nextra

apps/site/next-env.d.ts

@@ -2,4 +2,4 @@
 /// <reference types="next/image-types/global" />
 
 // NOTE: This file should not be edited
-// see https://nextjs.org/docs/app/building-your-application/configuring/typescript for more information.
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

apps/site/next.config.ts

@@ -0,0 +1,44 @@
+import nextra from 'nextra'
+import { composePlugins, withNx } from '@nx/next';
+import type { WithNxOptions } from '@nx/next/plugins/with-nx';
+import type { NextraConfig } from 'nextra';
+
+// base Next config (with Nx)
+const nextConfig: WithNxOptions = {
+  nx: {},
+  compiler: {
+    styledComponents: false,
+  },
+  experimental: {},
+  // rewrite PostHog URLs - https://posthog.com/docs/advanced/proxy/nextjs
+  async rewrites() {
+    return [
+      {
+        source: '/ingest/static/:path*',
+        destination: 'https://us-assets.i.posthog.com/static/:path*',
+      },
+      {
+        source: '/ingest/:path*',
+        destination: 'https://us.i.posthog.com/:path*',
+      },
+    ];
+  },
+  sassOptions: {},
+  // This is required to support PostHog trailing slash API requests
+  skipTrailingSlashRedirect: true,
+};
+
+// Nextra config
+const nextraConfig: NextraConfig = {
+
+};
+const withNextra = nextra(nextraConfig);
+
+// Next plugins
+const plugins = [
+  // Add more Next.js plugins to this list if needed.
+  withNx,
+  withNextra
+];
+
+export default composePlugins(...plugins)(nextConfig);