Amazon ECS supports running Firelens as a non-root user

[Amazon Elastic Container Services](https://aws.amazon.com/ecs/) (Amazon ECS) now allows you to run Firelens containers as a non-root user, by specifying a User ID in your Task Definition. Specifying a non-root user with a specific user ID reduces the potential attack footprint by users who may gain access to such software, a security best practice and a compliance requirement by some industries and security services such as the [AWS Security Hub](https://aws.amazon.com/security-hub/). With this release, Amazon ECS allows you to specify a user ID in the "user" field of your Firelens containerDefinition element of your Task Definition, instead of only allowing "user": "0" (root user). The new capability is supported in all AWS Regions. See the [documentation for using Firelens](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/using%5Ffirelens.html) for more details on how to set up your Firelens container to run as non-root.