website: send Hub early access form submission to posthog

website/Caddyfile

@@ -3,6 +3,20 @@
 }
 
 :8000 {
+    # Reverse proxy PostHog through our own domain so ad blockers don't drop analytics requests.
+    # Static assets (e.g. array.js) are served from a separate PostHog assets host.
+    handle_path /phproxy/static/* {
+        rewrite * /static{uri}
+        reverse_proxy https://us-assets.i.posthog.com {
+            header_up Host us-assets.i.posthog.com
+        }
+    }
+    handle_path /phproxy/* {
+        reverse_proxy https://us.i.posthog.com {
+            header_up Host us.i.posthog.com
+        }
+    }
+
     root * /usr/share/caddy
     file_server
     log