feat: add posthog reverse proxy (#449)

apps/marketing/next.config.js

@@ -56,6 +56,14 @@ const config = {
       },
     ];
   },
+  async rewrites() {
+    return [
+      {
+        source: '/ingest/:path*',
+        destination: 'https://eu.posthog.com/:path*',
+      },
+    ];
+  },
 };
 
 module.exports = withContentlayer(config);

apps/web/next.config.js

@@ -29,6 +29,14 @@ const config = {
       transform: 'lucide-react/dist/esm/icons/{{ kebabCase member }}',
     },
   },
+  async rewrites() {
+    return [
+      {
+        source: '/ingest/:path*',
+        destination: 'https://eu.posthog.com/:path*',
+      },
+    ];
+  },
 };
 
 module.exports = config;

packages/lib/constants/feature-flags.ts

@@ -1,3 +1,5 @@
+import { APP_BASE_URL } from './app';
+
 /**
  * The flag name for global session recording feature flag.
  */
@@ -23,7 +25,7 @@ export const LOCAL_FEATURE_FLAGS: Record<string, boolean> = {
  */
 export function extractPostHogConfig(): { key: string; host: string } | null {
   const postHogKey = process.env.NEXT_PUBLIC_POSTHOG_KEY;
-  const postHogHost = process.env.NEXT_PUBLIC_POSTHOG_HOST;
+  const postHogHost = `${APP_BASE_URL}/ingest`;
 
   if (!postHogKey || !postHogHost) {
     return null;