plankanban/planka ? reverse-engineered prompt

I want to build a self-hosted project management web app, sort of like a Trello clone that I can run myself. It should be based on the Kanban methodology.

Users need to be able to create projects, and within each project, have different boards. On each board, they can create lists like "To-Do," "In Progress," and "Done." The main feature is adding cards to these lists and being able to drag and drop them to other lists. It needs to be a collaborative tool, so when one person moves a card, everyone else on the board should see the update in real-time without needing to refresh the page.

For the cards, allow for rich text descriptions using Markdown. For authentication, it would be great if it could support single sign-on using OpenID Connect. Please use a modern JavaScript stack with something like React and Node.js, and make sure the whole application is containerized with Docker so it's simple to deploy.