Roles
Configure different types of roles in the deployment. Common uses include running web roles and job roles. Roles are defined under roles.
roles:
  web:
  worker:
    cmd: bundle exec sidekiq
Environment variables
See Environment variables for full reference.
    env:
      ...
Options
Options are passed to the Docker run command as --<name> <value>.
    options:
      memory: 2g
      cpus: 2
Custom command
Set a custom command to run in the container.
    cmd: "bundle exec sidekiq"