Plone 5.1 docker container on AWS ECS

Greetings! We're setting up a Plone installation for our internal organization, and thought to use the Docker image hosted from Amazon Elastic Container Service. We have two linked containers in the same task definition, as per the documentation. Unfortunately, the container gets killed immediately upon startup because it can't pass its health check (hitting the plone client container on port 8080, even when mapped and checked on a different port).

Any tips from folk who have set up Plone on ECS before?

P.S.... the container is dying because the health check fails, but the ALB is pointed at the right port.