(ntfy): Swith to ntfy in update check script.

bin/executable_update-check.sh

@@ -5,7 +5,6 @@
 # MUST RUN AS ROOT (best in a cronjob)
 #
 
-token="https://heavy.uber.space/gotify/message?token=Apw3EgT7BpQZ0rs"
 MYTEMPDIR="$(mktemp -d)"
 MYAPT="$MYTEMPDIR/apt-update.txt"
 trap 'rm -rf -- "$MYDIR"' EXIT
@@ -20,6 +19,6 @@ else
     LST="$(aptitude -F %p search '~U')"
     LST="$(echo $LST | tr '\n' ' ')"
     text="$SUMMARY ($(uname -n)):\n $LST"
-    curl -H "Content-Type: application/json" -X POST $token -d "{\"title\":\"Debian Update Checker\",\"message\":\"$text\"}"
+    curl -H "Tags: $(hostname)" -H "Title: Debian Update Check" -H "Icon: https://www.debian.org/logos/openlogo-nd-75.png" -d "Debian update check: $text" https://ntfy.coolify.gaiselmann.de/hetzner
 fi