chore: update workflow for opentofu

.github/workflows/infra-build.yml

@@ -1,4 +1,4 @@
-name: Build Infra
+name: Build Infra (Opentofu)
 
 on:
   push:
@@ -6,35 +6,28 @@ on:
       - master
 
 jobs:
-  terraform:
+  opentofu:
-    name: Terraform Build
+    name: Opentofu Build
     runs-on: self-hosted
 
     env:
-      PG_CONN_STR: ${{ secrets.PG_CONN_STR }}   # <-- Add PostgreSQL backend connection string
+      PG_CONN_STR: ${{ secrets.PG_CONN_STR }}
+      
+    defaults:
+      run:
+        working-directory: ./opentofu-homelab
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
-      - name: Setup Terraform
+      - name: Setup Opentofu CLI
-        uses: hashicorp/setup-terraform@v2
-
-      - name: Terraform Init
-        run: terraform init
-
-      - name: Terraform Format Check
-        run: terraform fmt -check -recursive
-
-      - name: Terraform Validate
-        run: terraform validate
-
-      - name: Terraform Plan
-        id: plan
         run: |
-          terraform plan -out=tfplan -detailed-exitcode
+          curl -L https://github.com/opentofu/opentofu/releases/latest/download/opentofu-linux-amd64 -o /usr/local/bin/tofu
-        continue-on-error: false
+          chmod +x /usr/local/bin/tofu
+          tofu version
 
       - name: Generate Dynamic Vars (Secrets)
         run: |
@@ -48,6 +41,20 @@ jobs:
           passphrase = "${{ secrets.SSH_PASSPHRASE }}"
           EOF
 
-      - name: Terraform Apply
+      - name: Opentofu Init
+        run: tofu init
+
+      - name: Opentofu Format Check
+        run: tofu fmt -check -recursive
+
+      - name: Opentofu Validate
+        run: tofu validate
+
+      - name: Opentofu Plan
+        id: plan
+        run: |
+          tofu plan -out=tfplan -detailed-exitcode
+
+      - name: Opentofu Apply
         if: success()
-        run: terraform apply -auto-approve tfplan
+        run: tofu apply -auto-approve tfplan