fix: Move all stacks directly under stacks/ (no category subfolders)

stacks/node-exporter/README.md

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+# Node Exporter
+
+📈 **System-Metriken für Prometheus**
+
+Node Exporter sammelt Hardware- und Betriebssystem-Metriken.
+
+---
+
+## 🚀 Quick Start
+
+1. **In Komodo:** Stack auswählen → Deploy
+2. **Server wählen** (wo Prometheus läuft)
+3. **Warten** bis Container läuft
+4. **In Prometheus** als Target hinzufügen
+
+---
+
+## 🔧 Prometheus Integration
+
+In Prometheus Config (`prometheus.yml`):
+
+```yaml
+scrape_configs:
+  - job_name: 'node-exporter'
+    static_configs:
+      - targets: ['localhost:9100']
+```
+
+---
+
+## 🔐 Secrets
+
+Keine Secrets erforderlich.
+
+---
+
+## 📁 Files
+
+- `compose.yml` - Docker Compose Konfiguration
+
+---
+
+## 📊 Metriken
+
+Node Exporter exposed Metriken auf Port 9100:
+- CPU Usage
+- Memory Usage
+- Disk I/O
+- Network I/O
+- System Load
+
+---
+
+## 🔄 Updates
+
+Wird automatisch aktuell gehalten durch Komodo.
+
+---
+
+## 📞 Support
+
+- **GitHub:** https://github.com/prometheus/node_exporter
+- **Docs:** https://prometheus.io/docs/guides/node-exporter/

stacks/node-exporter/compose.yml

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+services:
+  node-exporter:
+    image: prom/node-exporter:latest
+    container_name: node-exporter
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:9100:9100"
+    volumes:
+      - /proc:/host/proc:ro
+      - /sys:/host/sys:ro
+      - /:/rootfs:ro
+    command:
+      - '--path.procfs=/host/proc'
+      - '--path.sysfs=/host/sys'
+      - '--path.rootfs=/rootfs'
+      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
+    networks:
+      - monitoring
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:9100/metrics"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+
+networks:
+  monitoring:
+    driver: bridge