add docker target for rubocoop

Dockerfile

@@ -57,6 +57,11 @@ RUN --mount=type=cache,target=/usr/local/bundle/ \
     /etc/init.d/mariadb stop && \
     cp -r /usr/local/bundle /bundle
 
+FROM builder as dev
+
+RUN gem install rubocop-rails rubocop-rspec rubocop-capybara rubocop-factory_bot
+
+
 FROM builder as app
 COPY --from=compiler /bundle /usr/local/bundle
 COPY --from=compiler /usr/src/app/public /usr/src/app/public

Makefile

@@ -4,10 +4,13 @@ IMAGE_NAME=foodsoft
 IMAGE_TAG:=latest
 
 image-dev:
-	docker buildx build --tag ${IMAGE_NAME}:${IMAGE_TAG} --progress=plain --target=builder .
+	docker buildx build --tag ${IMAGE_NAME}-rubocop:${IMAGE_TAG} --progress=plain --target=dev .
 
 image-prod:
 	docker buildx build --tag ${IMAGE_NAME}:${IMAGE_TAG} --no-cache --progress=plain --target=app .
 
 image-prod-dev:
 	docker buildx build --tag ${IMAGE_NAME}:${IMAGE_TAG} --progress=plain --target=app .
+
+rubocop:
+	docker run --rm -it -v ${PWD}:/work:ro --workdir /work foodsoft-rubocop bash