Rails 5.2.1 https://github.com/minakawa-daiki/rails-docker/blob/master/Gemfile MySQL MySQL 5.7 https://github.com/minakawa-daiki/rails-docker/blob/master/docker-compose.yml セットアップ .env.sample を .env にリネームする docker-compose run --rm web bundle exec rails new . --force --database=mysql config/database.ymlを編集する ... default: &default adapter: mysql2 encoding: utf8 pool: <%= ENV.fetch("RAILS_MAX_THREADS
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