Initial backup: 18 monitoring scripts + timers + docs

- 18 comprehensive monitoring checks
- 5 systemd timers (5min, 15min, hourly, daily, weekly)
- Complete documentation
- NTFY secure notification system
- Fixed debianvm disk space (91% to 57%)
- Fixed CloudReve integration
- Date: 2026-01-07

scripts/check-updates.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Check for available system updates
+set -euo pipefail
+
+SEND_NTFY="/usr/local/bin/send-ntfy.sh"
+
+# Update package cache
+apt-get update -qq >/dev/null 2>&1 || true
+
+# Count available updates
+REGULAR_UPDATES=$(apt list --upgradable 2>/dev/null | grep -c "upgradable" || echo "0")
+SECURITY_UPDATES=$(apt list --upgradable 2>/dev/null | grep -ic "security" || echo "0")
+
+if [ "$SECURITY_UPDATES" -gt 0 ]; then
+    $SEND_NTFY warning "Security Updates Available" "🟡 WARNING: $SECURITY_UPDATES security update(s) available on PVE\nTotal updates: $REGULAR_UPDATES" "warning,package,shield"
+elif [ "$REGULAR_UPDATES" -gt 10 ]; then
+    $SEND_NTFY info "System Updates Available" "ℹ️ INFO: $REGULAR_UPDATES system update(s) available on PVE" "package,info"
+fi
+
+logger -t updates-monitor "Updates: $REGULAR_UPDATES total, $SECURITY_UPDATES security"