Update .gitlab-ci.yml file

        # Install buildx

        # https://forum.gitlab.com/t/unknown-flag-platform-when-run-in-pipeline-to-aws/74320

        # ref: https://travis-ci.community/t/docker-buildx-problems/11017

        - mkdir -vp ~/.docker/cli-plugins/

        - wget -q "https://github.com/docker/buildx/releases/download/v0.9.1/buildx-v0.9.1.linux-arm64" -O ~/.docker/cli-plugins/docker-buildx

        - chmod a+x ~/.docker/cli-plugins/docker-buildx

        # - mkdir -vp ~/.docker/cli-plugins/

        # - wget -q "https://github.com/docker/buildx/releases/download/v0.9.1/buildx-v0.9.1.linux-arm64" -O ~/.docker/cli-plugins/docker-buildx

        # - chmod a+x ~/.docker/cli-plugins/docker-buildx

        # https://www.nithinbose.com/posts/build-multi-arch-docker-images-on-gitlab/

        - docker buildx create --use

        - docker buildx inspect --bootstrap

        - docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t $CI_REGISTRY_IMAGE .

        # - docker buildx create --use

        # - docker buildx inspect --bootstrap

        # - docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t $CI_REGISTRY_IMAGE .

        - docker build -t $CI_REGISTRY_IMAGE .

        - docker push $CI_REGISTRY_IMAGE

        - docker manifest inspect $CI_REGISTRY_IMAGE:latest