version: '3' services: web: build: context: . dockerfile: Dockerfile.dev ports: - '80:80' volumes: - '.:/usr/src/app' - gem_cache:/usr/local/bundle env_file: - .env expose: - '3001' stdin_open: true tty: true command: bundle exec rails s -p 80 -b '0.0.0.0' volumes: gem_cache: driver: local