Ability to use ENV variables about amazon-ecs-render-task-definition HOT 4 CLOSED

name: Some deployment workflow
on:
  push:
    branches:
      - master

env:
  CLUSTER_NAME: MyClusterName
  ECR_REGISTRY: ecr_registry
  REPO_ONE: repo_one
  REPO_TWO: repo_two
  IMAGE_TAG: sometag
jobs:
  deploy_task:
    name: Deploy The Task
    runs-on: ubuntu-latest
    steps:
      - name: Configure AWS Credentials
        uses: aws-actions/configure-aws-credentials@v1
        with:
          aws-access-key-id: <key>
          aws-secret-access-key: <secret>
          aws-region: <region>

      - name: Login to AWS ECR
        id: login-ecr
        uses: aws-actions/amazon-ecr-login@v1

      - name: Download Task Definition
        run: |
          aws ecs describe-task-definition \
          --task-definition <task-def-name> \
          --query taskDefinition > task-definition.json

      - name: Change image 1
        uses: aws-actions/amazon-ecs-render-task-definition@v1
        id: ch-task-def
        with:
          task-definition: task-definition.json
          container-name: <container-name>
          image: $ECR_REPOSITORY/$REPO_ONE:$IMAGE_TAG # This will fail with the message described in issue #49 

      - name: Deploy Task
        uses: aws-actions/amazon-ecs-deploy-task-definition@v1
        with:
          task-definition: ${{ steps.ch-task-def.outputs.task-definition }}
          service: <service-name>
          cluster: $CLUSTER_NAME # This will fail too with the message "Cluster must match ^[a-zA-Z0-9\-_]{1,255}$, but was $CLUSTER_NAME"