ci: add drone.yml

.drone.yml

@@ -0,0 +1,33 @@
+---
+kind: pipeline
+type: kubernetes
+name: Terraform root module
+
+trigger:
+  event:
+  - cron
+  - push
+  branch:
+  - master
+
+steps:
+- name: init
+  image: hashicorp/terraform:1.1.8
+  commands:
+  - terraform init
+
+- name: plan
+  image: hashicorp/terraform:1.1.8
+  commands:
+  - terraform plan -out .tfplan
+
+- name: apply
+  when:
+    when:
+      branch:
+      - master
+      event:
+      - push
+  image: hashicorp/terraform:1.1.8
+  commands:
+    - terraform apply -plan .tfplan -auto-approve