docker-compose.yml

version: '2'
services:
  db:
    image: postgres
  node:
    build: .
    command: bin/webpack-watcher
    volumes:
      - .:/app
    depends_on:
      - db
    environment:
      DATABASE_URL: postgresql://postgres:@db/ganbaruzoi_development
      RAILS_ENV: development
  web:
    build: .
    command: bin/rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/app
    ports:
      - "3000:3000"
    depends_on:
      - db
      - node
    environment:
      DATABASE_DEVELOPMENT_URL: postgresql://postgres:@db/ganbaruzoi_development
      DATABASE_TEST_URL: postgresql://postgres:@db/ganbaruzoi_test
      RAILS_ENV: development
# REF: byebugを使う設定 http://qiita.com/kbaba1001/items/39f81156589dd9a0d678      

Dockerfile

FROM ruby:2.3.3
ENV LANG C.UTF-8
RUN curl -sL https://deb.nodesource.com/setup_7.x  | bash -
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN npm install -g typescript
ENV APP /app
RUN mkdir $APP
WORKDIR $APP
ADD Gemfile Gemfile
ADD Gemfile.lock Gemfile.lock
RUN bundle install
ADD . $APP
RUN bin/yarn install