Run a multiline shell script inside Concourse CI

pipeline.yml

---
jobs:
  - name: run-script
    public: true
    plan:
      - task: execute-shell
        config:
          platform: linux
          image_resource:
            type: docker-image
            source:
              repository: busybox
              tag: latest
          run:
            path: /bin/ash
            args:
              - "-e"
              - "-c"
              - |
                echo "hello world! current date is: $(date '+%Y-%m-%d %H:%M:S')"
                uname -a
                id -u