🚚(helm) add posthog proxy

To contourn ads blocker, we add a proxy to the
posthog service. This way, we can access the
service from the same domain as the frontend.

src/helm/env.d/dev/values.impress.yaml.gotmpl

@@ -148,6 +148,13 @@ ingressAdmin:
   enabled: true
   host: impress.127.0.0.1.nip.io
 
+posthog:
+  ingress:
+    enabled: false
+
+  ingressAssets:
+    enabled: false
+
 ingressMedia:
   enabled: true
   host: impress.127.0.0.1.nip.io