Using Kaniko to build and push images through Gitlab-CI to ECR

.gitlab-ci.yml

#base image in which all stages are executed
image: alpine
# Ordered stages of the CI pipeline
stages:
  - build_and_push

build and push docker image:
  stage: build_and_push
  only:
    variables:
        - $CI_COMMIT_TAG =~ /^v[0-9]+\.[0-9]+\.[0-9]+$/
  variables: 
    AWS_DEFAULT_REGION: REGION_NAME
    CI_REGISTRY_IMAGE: YOUR_ACCOUNT_ID.dkr.ecr.REGION_NAME.amazonaws.com/REPO_NAME
  image:
    name: gcr.io/kaniko-project/executor:debug
    entrypoint: [""]
  script:
    - mkdir -p /kaniko/.docker
    - echo "{\"credsStore\":\"ecr-login\"}" > /kaniko/.docker/config.json
    - >-
      /kaniko/executor
      --context "${CI_PROJECT_DIR}"
      --dockerfile "${CI_PROJECT_DIR}/Dockerfile"
      --destination "${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}"