Router - CloudWatch multi-line config

[huntharo]

Motivations

• Exceptions are being split across multiple lines

Docs

https://docs.aws.amazon.com/AmazonECS/latest/developerguide/firelens-concatanate-multiline.html#:~:text=Concatenating%20multiline%20or%20stack-trace%20Amazon%20ECS%20log%20messages%20-%20Amazon

Acceptance Criteria

• Read the doc
• Add the config files
• Confirm it works