feat(docs): switch to SSR with PostHog reverse proxy and GA

- Remove static export, enable Next.js SSR for Netlify
- Add /ingest/* rewrites to proxy PostHog (bypasses ad blockers)
- Add Google Analytics support via NEXT_PUBLIC_GA_ID
- Remove hardcoded keys, all analytics config via env vars

Co-Authored-By: Glinr <bot@glincker.com>

Author: thegdsks

apps/docs/next.config.mjs

@@ -14,13 +14,8 @@ const basePath = process.env.NEXT_PUBLIC_BASE_PATH || ''
 
 export default withNextra({
   reactStrictMode: true,
-  output: 'export',
   trailingSlash: true,
   basePath,
-  env: {
-    NEXT_PUBLIC_POSTHOG_KEY: process.env.NEXT_PUBLIC_POSTHOG_KEY,
-    NEXT_PUBLIC_POSTHOG_HOST: process.env.NEXT_PUBLIC_POSTHOG_HOST,
-  },
   assetPrefix: basePath ? `${basePath}/` : undefined,
   webpack: (config) => {
     // Force a single React instance for linked local packages (featuredrop -> root react devDep).
@@ -41,5 +36,21 @@ export default withNextra({
   },
   images: {
     unoptimized: true
-  }
+  },
+  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*',
+      },
+      {
+        source: '/ingest/decide',
+        destination: 'https://us.i.posthog.com/decide',
+      },
+    ]
+  },
 })

apps/docs/package.json

@@ -4,7 +4,7 @@
   "version": "0.0.1",
   "scripts": {
     "prebuild": "node ./scripts/generate-seo-files.mjs",
-    "postbuild": "node ./scripts/verify-static-export.mjs && node ./scripts/verify-metadata.mjs",
+    "postbuild": "node ./scripts/verify-metadata.mjs",
     "dev": "next dev -p 3003",
     "build": "next build",
     "start": "next start",

apps/docs/theme.config.tsx

@@ -211,7 +211,8 @@ const config: DocsThemeConfig = {
   // Load PostHog
   !function(t,e){var o,n,p,r;e.__SV||(window.posthog=e,e._i=[],e.init=function(i,s,a){function g(t,e){var o=e.split(".");2==o.length&&(t=t[o[0]],e=o[1]),t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}}(p=t.createElement("script")).type="text/javascript",p.crossOrigin="anonymous",p.async=!0,p.src=s.api_host.replace(".i.posthog.com","-assets.i.posthog.com")+"/static/array.js",(r=t.getElementsByTagName("script")[0]).parentNode.insertBefore(p,r);var u=e;for(void 0!==a?u=e[a]=[]:a="posthog",u.people=u.people||[],u.toString=function(t){var e="posthog";return"posthog"!==a&&(e+="."+a),t||(e+=" (stub)"),e},u.people.toString=function(){return u.toString(1)+".people (stub)"},o="init capture register register_once register_for_session unregister unregister_for_session getFeatureFlag getFeatureFlagPayload isFeatureEnabled reloadFeatureFlags updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures on onFeatureFlags onSessionId getSurveys getActiveMatchingSurveys renderSurvey canRenderSurvey getNextSurveyStep identify setPersonProperties group resetGroups setPersonPropertiesForFlags resetPersonPropertiesForFlags setGroupPropertiesForFlags resetGroupPropertiesForFlags reset get_distinct_id getGroups get_session_id get_session_replay_url alias set_config startSessionRecording stopSessionRecording sessionRecordingStarted captureException loadToolbar get_property getSessionProperty createPersonProfile opt_in_capturing opt_out_capturing has_opted_in_capturing has_opted_out_capturing clear_opt_in_out_capturing debug".split(" "),n=0;n<o.length;n++)g(u,o[n]);e._i.push([i,s,a])},e.__SV=1)}(document,window.posthog||[]);
   posthog.init('${POSTHOG_KEY}',{
-    api_host:'${POSTHOG_HOST}',
+    api_host:'/ingest',
+    ui_host:'${POSTHOG_HOST}',
     person_profiles:'identified_only',
     capture_pageview:true,
     capture_pageleave:true,