Import Trello cards with attachments and checklists

[Paul Wareham]

I have an existing project in Trello that has cards with descriptions, attachments, and embedded checklists.  I would like to move these to a Project in Jira software.  The project is already setup in Jira with no issues/epics/tasks yet.  

What is the best workflow to use to get the Trello cards into issues, and retain the attachments and checklists (these could be subtasks) in Jira?