Building with Pulumi > Secrets fails on update

[cnunciato]

On the Building with Pulumi > Secrets page, there's a step in which DB and backend containers get updated to use a secret that fails in multiple ways because those containers must be replaced rather than just updated, and their ports are already allocated:

Diagnostics:
  docker:index:Container (backendContainer):
    error: 1 error occurred:
        * creating urn:pulumi:dev::my-first-app::docker:index/container:Container::backendContainer: 1 error occurred:
        * Unable to start container: Error response from daemon: driver failed programming external connectivity on endpoint backend-dev (ec4338f50f621648fb1a23b7950b7c1236cfaa4cbf46e55cdcc231e70af4ada6): Bind for 0.0.0.0:3000 failed: port is already allocated

We should probably use deleteBeforeReplace here to get around this issue until we're able to replace these tutorials with new ones.