ci: check docs and format

.drone.yml

@@ -68,8 +68,30 @@ steps:
     TF_VAR_lawndale_dns_key_algorithm:
       from_secret: lawndale-dns-key-algorithm
 
+---
+kind: pipeline
+type: kubernetes
+name: Check docs and format
+
+environment:
+  TF_IN_AUTOMATION: "1"
+
+trigger:
+  ref:
+    - refs/pull/*/head
+
+steps:
+- name: format and generate docs
+  image: hashicorp/terraform:1.1.8
+  commands:
+    - apk add bash wget 
+    - wget -q https://github.com/terraform-docs/terraform-docs/releases/download/v0.16.0/terraform-docs-v0.16.0-linux-amd64.tar.gz -O - | tar -xz terraform-docs -C /usr/local/bin
+    - terraform fmt
+    - terraform-docs .
+    - git diff-index --name-status HEAD
+
 ---
 kind: signature
-hmac: e5dd07c87773ffb3b02240744e4bdde91d9338a344d0ba2d393f598aac43cdfd
+hmac: c6554c5e7fc2c06848178745fbc97f30f1a5c652f9ad93995c901cb8cb7296e1
 
 ...