tofu setup

docs/REFERENCE.md

@@ -72,9 +72,22 @@ Internet
 
 ```
 launchpad/
-├── bootstrap.sh                   # Cluster initialization script
-├── _app-of-apps-upc-dev.yaml     # Root ArgoCD Application (upc-dev)
-├── _app-of-apps-upc-prod.yaml    # Root ArgoCD Application (upc-prod)
+├── bootstrap.sh                   # Cluster initialization (ArgoCD + GitOps)
+├── _app-of-apps-{cluster}.yaml   # Root ArgoCD Application (per cluster)
+│
+├── .tofu/                         # Infrastructure provisioning (OpenTofu)
+│   ├── platforms/                 # Per-platform IaC
+│   │   ├── aks/                   # Azure: modules/cluster/, dev/, prod/, workload/
+│   │   ├── eks/                   # AWS: same structure
+│   │   ├── gke/                   # GCP
+│   │   └── upc/                   # UpCloud
+│   ├── configs/                   # Platform credentials (git-ignored)
+│   └── scripts/                   # setup-cluster.sh, teardown-cluster.sh, get-kubeconfig.sh
+│
+├── clusters/                      # Cluster metadata YAML
+│   ├── aks-dev.yaml
+│   ├── upc-dev.yaml
+│   └── ...
 │
 ├── infra/                         # Infrastructure applications (Kustomize)
 │   ├── base/                      # One subdirectory per component