Initial commit: Infrastructure documentation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -0,0 +1,43 @@
+# ExpertFab – Infrastruktur Dokumentation
+
+Zentrale Dokumentation der ExpertFab IT-Infrastruktur.
+
+## Inhalt
+
+| Dokument | Beschreibung |
+|---|---|
+| [docs/infrastructure.md](docs/infrastructure.md) | VM-Inventar, Proxmox-Hosts, Netzwerk |
+| [docs/access.md](docs/access.md) | SSH-Zugänge, API-Token, Credentials |
+| [docs/k3s.md](docs/k3s.md) | K3s-Cluster, Namespaces, Ingresses, ERPNext |
+| [docs/storage.md](docs/storage.md) | Longhorn Storage, PVCs, StorageClasses |
+
+## Schaubilder
+
+| Datei | Beschreibung |
+|---|---|
+| [diagrams/k8s_cluster.png](diagrams/k8s_cluster.png) | Gesamte Infrastruktur (Proxmox + K3s) |
+| [diagrams/storage_architecture.png](diagrams/storage_architecture.png) | Longhorn Storage Architektur |
+
+Schaubilder neu generieren:
+```bash
+cd diagrams
+python3 k8s_cluster_diagram.py
+python3 storage_diagram.py
+```
+
+## Schnellzugriff
+
+```bash
+# Proxmox
+ssh -i ~/.ssh/hetzner_key root@10.42.70.1
+
+# K3s Control Plane
+ssh -i ~/.ssh/hetzner_key sd@10.42.71.50
+
+# kubectl (am Control Plane)
+sudo KUBECONFIG=/etc/rancher/k3s/k3s.yaml kubectl get pods -A
+
+# kubectl via Proxmox (ohne sudo-Passwort)
+ssh -i ~/.ssh/hetzner_key root@10.42.70.1 \
+  "qm guest exec 119 -- bash -c 'KUBECONFIG=/etc/rancher/k3s/k3s.yaml kubectl get pods -A'"
+```