fix(README): Update HOSTNAME and add TAILSCALE_TAILNET_DOMAIN for Tailscale configuration

README.md

@@ -86,8 +86,8 @@ These are fundamental for basic operation and permissions.
     *   **Note:** Using the correct IDs is crucial for file permissions, especially for accessing media files on the host.
 *   `TIMEZONE`: Your local timezone (e.g., `America/New_York`, `Europe/London`, `Asia/Manila`). Find yours from [this list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
     *   *Default:* `America/New_York`
-*   `HOSTNAME`: The primary hostname or IP address you intend to use to access your services. Traefik uses this for routing. Can be a local IP or a fully qualified domain name (e.g., `nas.example.com`).
-    *   *Default:* `localhost`
+*   `HOSTNAME`: The primary hostname or IP address you intend to use to access your services. Traefik uses this for routing. Can be a local IP or a fully qualified domain name (e.g., `tailscale-nas.your-tailnet.ts.net`).
+    *   *Default:* `${TAILSCALE_HOSTNAME}.${TAILSCALE_TAILNET_DOMAIN}`
 
 ---
 
@@ -113,6 +113,8 @@ Controls secure remote access via Tailscale.
     *   *Default:* (None - **Must be set**)
 *   `TAILSCALE_HOSTNAME`: The desired hostname for this NAS within your Tailscale network.
     *   *Default:* `tailscale-nas`
+*   `TAILSCALE_TAILNET_DOMAIN`: **Required.** The domain of your Tailnet, including your Tailnet's unique name
+    *   *Default:* `your-tailnet.ts.net` (**Must be set**)
 *   `TAILSCALE_TAGS`: Optional tags to apply to the Tailscale node (e.g., `tag:nas`).
     *   *Default:* `tag:nas`
 *   `ENABLE_FUNNEL_HTTPS`: Controls Tailscale's public accessibility.