---
kind: pipeline
name: default

platform:
  os: linux
  arch: amd64

steps:
- name: greeting
  pull: if-not-exists
  image: alpine
  commands:
  - echo hello

trigger:
  ref:
  - refs/tags/**
  - refs/pull/**
  - refs/pull-requests/**
  - refs/merge-requests/**
  - refs/heads/master

...