初めてRubyをさわながらAPIを作る
$ ruby --version
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin23]
$ rails --version
Rails 7.1.3.3
$ gem install rail
$ rails new [アプリの名前]
# 以下が出力されれば成功
# Bundle complete! 14 Gemfile dependencies, 82 gems now installed.
# Use `bundle info [gemname]` to see where a bundled gem is installed.