docker-compose.yml

services:
  database:
    image: postgres:14-alpine
    command: postgres -c "log_lock_waits=on" -N 1000 -c "fsync=off"
    environment:
      POSTGRES_PASSWORD: secret123
      POSTGRES_USER: app_rails
    healthcheck:
      test: "pg_isready --username=app_rails"
      timeout: 10s
      retries: 20
    ports:
      - "5432:5432"
    volumes:
      - database_data:/var/lib/postgresql/data

  # Rails app
  # Configured for "development" RAILS_ENV
  app-rails:
    build:
      context: ./app-rails
      target: dev
    depends_on:
      database:
        condition: service_healthy
    env_file: ./app-rails/.env
    environment:
      - DB_HOST=database
      - RAILS_BINDING=0.0.0.0
      - RAILS_ENV=development
    ports:
      - 3100:3000
    volumes:
      - ./app-rails:/rails
      # Use named volumes for directories that the container should use the guest
      # machine's dir instead of the host machine's dir, which may be divergent.
      # This is especially true for any dependency or temp directories.
      - app_rails_nodemodules:/rails/node_modules
      - app_rails_tmp:/rails/tmp
      - app_rails_storage:/rails/storage

volumes:
  database_data:
  app_rails_nodemodules:
  app_rails_tmp:
  app_rails_storage: