RailsプロジェクトをVSCodeからデバックできるようにする ref: https://qiita.com/igara/items/0c19b557e3d7cbc41233

file0.txt

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Local - Listen for rdebug-ide",
            "type": "Ruby",
            "request": "attach",
            "cwd": "${workspaceRoot}/rails",
            "remoteHost": "0.0.0.0",
            "remotePort": "1234",
            "remoteWorkspaceRoot": "${workspaceRoot}/rails",
            "useBundler": true
        },
        {
            "name": "Local Docker - Listen for rdebug-ide",
            "type": "Ruby",
            "request": "attach",
            "cwd": "${workspaceRoot}/rails",
            "remoteHost": "0.0.0.0",
            "remotePort": "1234",
            "remoteWorkspaceRoot": "/rails",
            "useBundler": true
        }
    ]
}

file1.txt

$ cd rails
$ bundle install --path vendor/bundle
$ bundle exec rdebug-ide --host 0.0.0.0 --port 1234 --dispatcher-port 26162 -- bin/rails s

file2.txt

$ docker-compose -f docker-compose.debug.yml up

file3.txt

ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)

require 'bundler/setup' # Set up gems listed in the Gemfile.
# require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
unless ( (('2.5.0'..'2.5.3').include? RUBY_VERSION) && defined?(Debugger) )
  # see: https://superuser.com/questions/1359747/is-it-possible-to-get-visual-studio-code-ide-debugging-of-apps-on-rails-5-2-to-w
  require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
end