Update notification service

AppImage/scripts/shutdown-notify.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+# ProxMenux Monitor - Shutdown Notification Script
+# This script is called by systemd ExecStop before the service terminates.
+# It sends a shutdown/reboot notification via the running Flask server.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CONFIG_DIR="/var/lib/proxmenux"
+CONFIG_FILE="$CONFIG_DIR/config.json"
+PORT="${PORT:-5000}"
+
+# Determine if this is a reboot or shutdown
+# Check for systemd targets or runlevel
+is_reboot=false
+if systemctl is-active --quiet reboot.target 2>/dev/null; then
+    is_reboot=true
+elif [ -f /run/systemd/shutdown/scheduled ]; then
+    if grep -q "reboot" /run/systemd/shutdown/scheduled 2>/dev/null; then
+        is_reboot=true
+    fi
+fi
+
+# Build the event type and message
+if [ "$is_reboot" = true ]; then
+    event_type="system_reboot"
+    reason="The system is rebooting."
+else
+    event_type="system_shutdown"
+    reason="The system is shutting down."
+fi
+
+hostname=$(hostname)
+
+# Try to send notification via internal API endpoint
+# The Flask server may still be running at this point
+curl -s -X POST "http://127.0.0.1:$PORT/api/internal/shutdown-event" \
+    -H "Content-Type: application/json" \
+    -d "{\"event_type\": \"$event_type\", \"hostname\": \"$hostname\", \"reason\": \"$reason\"}" \
+    --max-time 5 2>/dev/null || true
+
+# Give the notification a moment to be sent
+sleep 2
+
+# Now terminate the Flask process
+# Find the main process and send SIGTERM
+pkill -TERM -f "proxmenux-monitor" 2>/dev/null || true
+
+exit 0