Docker configuration

docker-compose.yml

version: "3"
services:
  db:
    image: postgres
  redis:
    image: redis
  web:
    build: .
    command: foreman start -f Procfile.dev
    volumes:
      - app-web-sync:/app:nocopy
      - app-bundle-sync:/bundle:nocopy
    environment:
      RAILS_ENV: development
    ports:
      - "5000:5000"
    depends_on:
      - db
      - redis
volumes:
  app-web-sync:
    external: true
  app-bundle-sync:
    external: true

docker-sync.yml

version: "2"
options:
  verbose: true
syncs:
  app-web-sync:
    src: "./app"
    sync_strategy: "unison"
    sync_excludes: ['.gitignore', '.git/', 'tmp', 'log']
    sync_args: '-v --inplace'
    notify_terminal: false
    watch_excludes: ['.*/.git', '.gitignore', 'docker-*.yml', 'Dockerfile']
    watch_args: '-v'
  app-bundle-sync:
    src: "./bundle"
    sync_strategy: "unison"

Dockerfile

FROM ruby:2.4.1

RUN apt-get update -qq && apt-get install -y build-essential

# for postgres
RUN apt-get install -y libpq-dev

# for nokogiri
RUN apt-get install -y libxml2-dev libxslt1-dev

# for a JS runtime
RUN apt-get install -y nodejs

# Install Redis
RUN apt-get install -y redis-server

# Install Imagemagick
RUN apt-get install -y imagemagick

ENV APP_HOME /app
RUN mkdir $APP_HOME
WORKDIR $APP_HOME

ADD Gemfile* $APP_HOME/
RUN gem install --no-ri --no-rdoc bundler
RUN bundle install

# Install foreman
RUN gem install foreman

# Add default foreman config
ADD Procfile $APP_HOME/Procfile.dev

ADD . $APP_HOME

CMD foreman start -f Procfile.dev