build, tag, push docker image without using actions on github workflow.txt

- name: Build, tag, and push docker image to Amazon ECR
  env:
        REGISTRY: ${{ steps.login-ecr.outputs.registry }}
        REPOSITORY: skkuding_expressjs
        # IMAGE_TAG: ${{ github.sha }}
  run: |
        docker build -t $REGISTRY/$REPOSITORY:latest ./expressjs/ && docker push $REGISTRY/$REPOSITORY:latest