Use simpler file structure

roles/common/.gitlab-ci.yml

@@ -0,0 +1,33 @@
+stages:
+  - lint
+  - test
+
+cache:
+  key: "$CI_COMMIT_REF_SLUG"
+  paths:
+    - .cache/pip
+    - node_modules/
+
+lint:
+  stage: lint
+  image: python:3.7
+  before_script:
+    - pip install ansible ansible-lint --quiet
+  script:
+    - ansible-lint playbook.yml
+  only:
+    refs:
+      - development
+      - merge_requests
+
+pretty-lint:
+  stage: lint
+  image: node:12
+  before_script:
+    - npm install
+  script:
+    - npx prettier "**/*.yml" --check
+  only:
+    refs:
+      - development
+      - merge_requests