Dockerfile
FROM ruby:2-alpine
WORKDIR /usr/src/app
COPY Gemfile /usr/src/app/
COPY Gemfile.lock /usr/src/app/
RUN apk --update add ruby ruby-dev ruby-bundler build-base && \
bundle install -j 4 --without test development && \
apk del build-base && rm -fr /usr/share/ri
RUN adduser -u 9000 -D app
USER app
COPY . /usr/src/app
CMD ["/usr/src/app/bin/codeclimate-scss-lint"]