ARG BUILDX_VERSION=0.4.2 ARG DOCKER_VERSION=latest FROM alpine AS fetcher RUN apk add curl ARG BUILDX_VERSION RUN curl -L \ --output /docker-buildx \ "https://github.com/docker/buildx/releases/download/v${BUILDX_VERSION}/buildx-v${BUILDX_VERSION}.linux-amd64" RUN chmod a+x /docker-buildx ARG DOCKER_VERSION FROM docker:${DOCKER_VERSION} COPY --from=fetcher /docker-buildx /usr/lib/docker/cli-plugins/docker-buildx