6 steps for migrating a PostgreSQL database between containers

I decided to run Kanboard, an open source project management application, in a rootless Podman pod as a small weekend project. The pod consists of three containers, an infra-container, a kanboard-container, and a postgresql-container. That deployment went well, but eventually, the image I used for the postgresql-container became deprecated, meaning it was no longer receiving updates. It was time to move to a different image, but that meant migrating a database between containers.