Makefile
.PHONY: image citest test
IMAGE_NAME ?= codeclimate/codeclimate-markdownlint
image:
docker build --rm -t $(IMAGE_NAME) .
citest: image
docker run \
--name "markdownlint-${CIRCLE_WORKFLOW_ID}" \
--workdir /usr/src/app \
$(IMAGE_NAME) bundle exec rake
docker cp "markdownlint-${CIRCLE_WORKFLOW_ID}":/usr/src/app/coverage ./coverage
test: image
docker run \
--workdir /usr/src/app \
$(IMAGE_NAME) bundle exec rake