rails + docker で pry-bybug をインストールするとWebサーバが上がらなくなる

前提・実現したいこと

docker + rails 環境で、デバッグツールの"pry-bybug"を入れたところで、
「docker-compose up （-d）」をするとWebサーバが上がらなくなってしまいました。

発生している問題・エラーメッセージ

エラーメッセージ

web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:84:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'pry-byebug'. (Bundler::GemRequireError)
web_1  | Gem Load Error is: uninitialized constant Pry::Command::ExitAll
web_1  | Backtrace for gem load error is:
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/commands/exit_all.rb:7:in `<module:PryByebug>'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/commands/exit_all.rb:3:in `<top (required)>'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/commands.rb:12:in `require'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/commands.rb:12:in `<top (required)>'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/cli.rb:5:in `require'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug/cli.rb:5:in `<top (required)>'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry/plugins.rb:55:in `require'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry/plugins.rb:55:in `load_cli_options'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:40:in `each'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:40:in `add_plugin_options'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:134:in `<top (required)>'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry.rb:78:in `require'
web_1  | /usr/local/bundle/gems/pry-0.13.1/lib/pry.rb:78:in `<top (required)>'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug.rb:3:in `require'
web_1  | /usr/local/bundle/gems/pry-byebug-3.7.0/lib/pry-byebug.rb:3:in `<top (required)>'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:81:in `require'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:81:in `block (2 levels) in require'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:76:in `each'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:76:in `block in require'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:65:in `each'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:65:in `require'
web_1  | /usr/local/lib/ruby/site_ruby/2.3.0/bundler.rb:114:in `require'
web_1  | /app/config/application.rb:7:in `<top (required)>'

該当のソースコード

Gemfile

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.0', '>= 5.0.0.1'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.3.18', '< 0.5'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
#gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

gem 'bootstrap', '~> 4.0.0'

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console'
  gem 'listen', '~> 3.0.5'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
  gem 'pry-bybug'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Dockerfile

FROM ruby:2.3.6
#RUN apt-get update -qq && apt-get install -y build-essential nodejs
RUN apt-get update -qq && apt-get install -y build-essential
RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - && apt-get install -y nodejs
RUN mkdir /app
WORKDIR /app
COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install
COPY . /app

docker-compose.yml

version: '3'
services:
  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/app
    ports:
      - 3000:3000
    depends_on:
      - db
    tty: true
    stdin_open: true
  db:
    image: mysql:5.7
    volumes:
      - db-volume:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: password
volumes:
  db-volume: