diff --git a/docker/observer_web/dev.exs b/docker/observer_web/dev.exs
index 583ca09..e5af39d 100644
--- a/docker/observer_web/dev.exs
+++ b/docker/observer_web/dev.exs
@@ -12,7 +12,8 @@ defmodule WebDev.Router do
   scope "/" do
     pipe_through(:browser)
 
-    observer_dashboard("/observer")
+    # Dedicated host observer.*.calentiq.com — mount at root (no /observer prefix)
+    observer_dashboard("/")
   end
 end