Changes for https://github.com/acmesh-official/acme.sh/pull/4193

notify.md

@@ -569,7 +569,32 @@ acme.sh --set-notify  --notify-hook callmebotWhatsApp
 
 The `CALLMEBOT_YOUR_PHONE_NO` and `CALLMEBOT_API_KEY` will be saved in ~/.acme.sh/account.conf and will be reused when needed.
 
+## 21. Set notification for customscript
+
+Notify via a custom shell script. The script is called with the following three parameters:
+1. Subject
+2. Message
+3. Status code (0: success, 1: error 2: skipped)
+
+To set the notification hook:
+
+```sh
+export CUSTOMSCRIPT_PATH="/usr/local/bin/acme-notification.sh"
+
+acme.sh --set-notify --notify-hook customscript
+```
+
+The CUSTOMSCRIPT_PATH will be saved in ~/.acme.sh/account.conf and will be reused when needed.
 
 
+Template for a custom script:
 
+```sh
+#!/usr/bin/env sh
 
+subject="$1"
+message="$2"
+status="$3"
+
+do-something "$subject ($status): $message"
+```