Update .gitlab-ci.yml

.gitlab-ci.yml

-include:
-  - template: Terraform/Base.gitlab-ci.yml  # https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Terraform/Base.latest.gitlab-ci.yml
+image:
+  name: hashicorp/terraform:light
+  entrypoint:
+    - '/usr/bin/env'
+    - 'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
 
 stages:
   - init