How to create custom tags for docker image at ECR

Hi
I am unable to create custom tags for the docker image. I can tag only the latest. But also want to tag Eg: offers,rec to image

  • put: ecr-docker-reg-dev
    params:
    build: NeXus
    dockerfile: NeXus/Dockerfile.dev
    build_args:
    AWS_ACCESS_KEY_ID: ((aws_dev.aws_access_key_id))
    AWS_SECRET_ACCESS_KEY: ((aws_dev.aws_secret_access_key))
    DJANGO_SETTINGS_MODULE: nexus.settings.dev.settings
    NEXUS_ENV: dev
    tag_as_latest: true
    tag_file: NeXus/.git/ref

I am trying to add

tag: offers

It’s not working