setup dockerLabels in ECS task definition

[gopkris2000]

@chicofranchico @muravjov
I deployed the prometheus-ecs-discovery container in one of my AWS EC2 instance. It is running fine but getting the same "Writing 0 discovered exporters to /tmp/ecs_file_sd.yml" errors.

The confusion part is here,
I tried to setup dockerLabels in my ECS task definition but showing a huge number of existing task definition in my AWS account and multiple cluster as well.
Do I need to modify each task definition with the above dockerLabels config? or create a new one and again deploy the new container "prometheus-ecs-discovery"?

Please help me.

Originally posted by @gopkris2000 in #68 (comment)