- Ruby 2.6.3
- Postgresql 11.5
docker-compose build
docker-compose up
docker ps # 現在立ち上がっているコンテナを確認
docker exec -it docker_web_1 /bin/bash
bin/rails db:create
bin/rails db:migrate
open http://localhost:3000
open http://localhost:3000/letter_opener
bin/rails spec