added plan step

.drone.yml

@@ -8,10 +8,18 @@ trigger:
     - main
 
 steps:
-  - name: Terraform FMT PR
+  - name: Terraform syntax check
     image: hashicorp/terraform:1.5
     commands:
       - terraform -chdir=infrastructure fmt -diff -check
     # when:
     #   event:
     #   - pull_request
+  - name: terraform plan
+    image: hashicorp/terraform:1.5
+    commands:
+      - terraform init
+      - terraform plan
+    # when:
+    #   event:
+    #   - pull_request