Utility containers

Various utility containers for situations where:

• You'd like to know what happens when a container just exits with an abnormal status code
• You need a placeholder container while launching the first ECS service

THe directory structure

.
|-- docker-compose.yml
`-- oneshot  # The oneshot command
    |-- Dockerfile
    `-- main.sh

Build and push the container images

$ docker-compose build
$ docker-compose push