FROM ruby:2.4.1-slim
RUN apt-get update && apt-get install -qq -y --no-install-recommends \
build-essential nodejs libpq-dev
ENV INSTALL_PATH /usr/src/app
RUN mkdir -p $INSTALL_PATH
WORKDIR $INSTALL_PATH
ADD Gemfile ./
ADD Gemfile.lock ./
RUN bundle install
ADD . ./