Because the ssm.Parameter's

arn

value is a Pulumi output, it's not known/resolvable at the time that I'm trying to set up my ECS task def. As I'm working in typescript, I'm used to working with promises - but I'm not sure how I should change the structure of my code to indicate to Pulumi that the

arn

is an Output that will need to be resolved and passed to

valueFrom

.