Use the stack name in the containerName

[arunasank]

Currently, the containerName uses the options.service string, which is configured by the watchbot client. Since the string is not created using CloudFormation helper functions, the containerName cannot be customised based on the stack name. This means that if multiple stacks are running on the same service, the containerName reflects the service name and not the stack name and this can be confusing if you're parsing Cloudtrail logs and looking for containers of a specific stack.

To fix, we can change

ecs-watchbot/lib/template.js

Line 667 in c950b97

{ Name: 'ContainerName', Value: prefixed('-worker-' + options.service) },

to concatenate using cloudfriend helper functions like Fn::Join

cc/ @mapbox/platform-engine-room