docs: improve Caddyfile header and note about misconfigured caddy service, minor docs update

website/docs/3-concepts/1-ingress/3-managing-caddy.md

@@ -94,6 +94,7 @@ services:
     x-ports:
       - 80:80@host
       - 443:443@host
+      - 443:443/udp@host
     x-caddy: Caddyfile
     deploy:
       mode: global
@@ -138,7 +139,8 @@ internal.example.com {
 :::info note
 
 The specified `command`, `environment`, `volumes`, and `x-ports` properties are essential for Caddy to function
-correctly in the Uncloud cluster.
+correctly in the Uncloud cluster. Do not change the source paths of the volume mounts as the Uncloud daemon relies on
+them to communicate with Caddy and update its configuration.
 
 :::
 
@@ -160,8 +162,9 @@ uc caddy config
 Example output:
 
 ```caddyfile
-# This file is autogenerated by Uncloud based on the configuration of running services.
-# Do not edit manually. Any manual changes will be overwritten on the next update.
+# Caddyfile autogenerated by Uncloud (DO NOT EDIT): 2025-12-22T10:30:12Z
+# Automatically updated on service or health status changes.
+# Docs: https://uncloud.run/docs/concepts/ingress/overview
 
 # User-defined global config from service 'caddy'.
 # Global options.