name: 'Lint Markdown'
on: 
  pull_request:
    types: [opened, synchronize]

jobs:
  lint-markdown:
    name: Lint markdown
    runs-on: ubuntu-latest
    steps:
    - name: Check out code
      uses: actions/checkout@v2

    - name: Lint markdown files
      uses: docker://avtodev/markdown-lint:v1 # fastest way
      with:
        config: '.markdownlint.yaml'
        args: '**/*.md'
        ignore: '_snippets' # multiple files must be separated with single space