For a design file to be Bravo-ready, you must add [containers]. These are components placed as a 2nd-level layer: inside ("nested" in) the app page and containing the different UI elements.
Containers have two main functions:
Wrap the individual UI elements (images, text, etc.) in the design.
Allow to create lists in the app page. Each container can be bound to API data that will make the container populate to a list in the app. To create a list, a placeholder list element needs to be created in the design, and wrapped in a container. How to connect the API data is further explained in the Connecting to APIs section.
How to create a container
You can find below how to create a container, depending on the design tool you use.