update terraform script

ci-scripts/generate-pipeline.sh

@@ -13,12 +13,11 @@ for dir in templates/*; do
 
 validate_${name}:
   stage: validate
-  image: alpine:latest
+  image: hashicorp/terraform:1.12
-  before_script:
-    - apk add --no-cache terraform
   script:
-    - terraform -chdir=$dir init -backend=false
+    - cd $dir
-    - terraform -chdir=$dir validate
+    - init -backend=false
+    - validate
 
 deploy_${name}:
   stage: deploy