docker-compose.yml

version: "3"
services:
  postgres:
    image: postgres:12
    volumes:
      - ./docker-db:/var/lib/postgresql/data
    environment:
      POSTGRES_PASSWORD: secret-postgres-password
  web:
    build: .
    command: bundle exec puma -C config/puma.rb
    ports:
      - "3000:3000"
    depends_on:
      - postgres
    environment:
      DATABASE_URL: "postgres://postgres:secret-postgres-password@postgres:5432/rails-starter"
      SECRET_KEY_BASE: super-secret-key-base
      RAILS_SERVE_STATIC_FILES: "true"