Drone CI sample caching config

sample.drone.yml

kind: pipeline
name: default

steps:
- name: publish
  image: plugins/ecr
  environment:
    PLUGIN_STORAGE_DRIVER: overlay2
    PLUGIN_CACHE_FROM: xxxxx.dkr.ecr.ap-southeast-1.amazonaws.com/pvsune/myapp:latest
  settings:
    access_key:
      from_secret: aws_access_key_id
    secret_key:
      from_secret: aws_secret_access_key
    repo: xxxxx.dkr.ecr.ap-southeast-1.amazonaws.com/pvsune/myapp
    registry: xxxxx.dkr.ecr.ap-southeast-1.amazonaws.com
    region: ap-southeast-1
    tags:
      - latest
      - ${DRONE_BRANCH/\//_}
  when:
    event:
    - push
    - tag

- name: notify post publish
  image: plugins/slack
  settings:
    webhook: https://hooks.slack.com/services/XXXXX/XXXXX/XXXXX
    channel: engineering-drone
  when:
    event:
    - push