Build with filtered source

Further nixos module fixes
Add tailwind and esbuild to assets build
Handle domain on session cookies correctly

lib/sso_bsn_web/live/user_registration_live.ex

@@ -88,8 +88,7 @@ defmodule SsoBsnWeb.UserRegistrationLive do
         {:noreply, socket |> redirect(to: ~p"/users/log_in/#{login_token}")}
 
       {:error, error} ->
-        dbg(error)
-        {:noreply, socket |> put_flash(:error, "An error occured")}
+        {:noreply, socket |> put_flash(:error, "An error occured: #{inspect(error)}")}
     end
   end