Reusing YAML in Notifier templates

In the service call, the message "The Pool Gate just opened" is automatically populated in the message section for the script syno_notify_engine.yaml, as is the image field. In this way, you can re-use one script and just fill in the missing data.

- service: script.syno_notify_engine
  data_template:
    message: "The Pool Gate just opened"
    image: pool_gate.jpg

# syno_notify_engine.yaml:
  alias: 'Syno Notifier'
  sequence:
    - service: notify.hass_synochat
      data_template:
        message: '{{message}}'
        data:
          file_url: 'http://ipofhass:8123/local/images/{{image}}'