Setup a simple workflow for building app previews articel

codemagic.yaml

workflows:
  app-preview:
    name: App Preview
    # All available instance types:
    # https://docs.codemagic.io/yaml/yaml-getting-started/#instance-type
    instance_type: mac_pro
    max_build_duration: 75
    environment:
      flutter: v2.8.1
    when:
      # We skipping the app preview for draft pull request to save Codemagic
      # build seats.
      condition: event.pull_request.draft == false
    triggering:
      events:
        - pull_request
      # We canceling the previous build, so we save Codemagic build seats. This
      # means, if we first push commit "A" and after a few minutes commit "B" to
      # the pull request, will be the build for commit "A" canceled. 
      cancel_previous_builds: true
    scripts:
      - name: Install dependencies
        script: flutter pub get