chore: updated compose for new recommended variables

Author: etiennecollin

compose.yaml

@@ -21,5 +21,7 @@ services:
       UNIFI_CONTROLLER_URL: "URL to your UniFi controller with protocol (`http://` or `https://`)."
       UNIFI_API_KEY: "API Key for your UniFi controller."
       UNIFI_HAS_VALID_CERT: "true" # Set to false only if your UniFi controller does not use a valid SSL certificate. Typically, this should remain true when accessing the controller (UNIFI_CONTROLLER_URL) through a reverse proxy or any setup providing trusted SSL certificates (e.g., Let's Encrypt).
-      WIFI_SSID: "Your guest WiFi SSID" # Optional
-      WIFI_PASSWORD: "Youw guest WiFi password" # Optional
+      WIFI_SSID: "Your guest WiFi SSID" # Optional, but recommended
+      WIFI_PASSWORD: "Youw guest WiFi password" # Optional, but recommended
+      GUEST_SUBNETWORK: "Your guest subnetwork in IPv4 CIDR notation (X.X.X.X/X)" # Optional, but recommended
+      TIMEZONE: "Your timezone (America/Toronto)" # Optional, but recommended