docker-compose.yml

version: "3.7"

volumes:
  postgres:
  in_memory_store:

services:
  db:
    image: postgres:11-alpine
    ports:
      - 5432:5432
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    volumes:
      - postgres:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "postgres"]

  in_memory_store:
    image: redis:5-alpine
    ports:
      - 6379:6379
    volumes:
      - in_memory_store:/var/lib/redis/data
    healthcheck:
      test: ["CMD", "redis-cli", "-h", "localhost", "ping"]

  server_app: &server_app
    build: .
    command: bundle exec rails server -b 0.0.0.0
    entrypoint: ./docker-entrypoint.sh
    volumes:
      - .:/home/www/boilerplate_rails_api
    tty: true
    stdin_open: true
    environment: &server_app_env
      DB_HOST: db
      DB_PORT: 5432
      DB_USERNAME: postgres
      DB_PASSWORD: postgres
      REDIS_DB: redis://in_memory_store:6379
    depends_on:
      - db
    ports:
      - 3000:3000
    healthcheck:
      test: ["CMD", "http", "GET", "localhost:3000"]

  server_worker_app:
    <<: *server_app
    command: bundle exec sidekiq -C config/sidekiq.yml
    entrypoint: ""
    ports: []
    depends_on:
      - db
      - in_memory_store
    healthcheck:
      test: ["CMD-SHELL", "ps ax | grep -v grep | grep sidekiq || exit 1"]