# syntax = docker/dockerfile:1

FROM ruby:slim as build

RUN apt-get update &&\
    apt-get install --yes build-essential git

RUN gem install rails
RUN rails new demo --minimal --skip-active-record

FROM ruby:slim

COPY --from=build /demo /demo
COPY --from=build /usr/local/bundle /usr/local/bundle

COPY <<-"EOF" /demo/config/routes.rb
Rails.application.routes.draw { root "rails/welcome#index" }
EOF

WORKDIR demo
ENV RAILS_ENV=production
EXPOSE 3000
CMD bin/rails server