fix(docker-compose): Simplify Traefik routing rules by removing hostname conditions

.env.example

@@ -8,7 +8,6 @@ CONFIG_ROOT="."
 DATA_ROOT="/mnt/data"
 DOWNLOAD_ROOT="/mnt/data/torrents"
 IMMICH_UPLOAD_LOCATION="/mnt/data/photos"
-HOSTNAME=localhost
 HOMEASSISTANT_HOSTNAME=
 IMMICH_HOSTNAME=
 ADGUARD_HOSTNAME=
@@ -47,6 +46,9 @@ DECLUTTARR_REMOVE_ORPHANS=True
 # --- Tailscale Settings ---
 TAILSCALE_AUTHKEY=
 TAILSCALE_HOSTNAME=tailscale-nas
+TAILSCALE_TAILNET_DOMAIN=your-tailnet.ts.net
 TAILSCALE_TAGS=tag:nas
 # Enable Tailscale Funnel (public access) for HTTPS? Set to 'true' or 'false'.
 ENABLE_FUNNEL_HTTPS=false
+
+HOSTNAME=${TAILSCALE_HOSTNAME}.${TAILSCALE_TAILNET_DOMAIN}