「Rails s」ができません（rails + docker）

前提・実現したいこと

＜いつもと同じディレクトリでrails sしていますが、立ち上がりません。＞

超初心者です。
言葉足らずでしたら、すいません。

Docker(Version 18.03.0-ce-mac60)
Rails 5.0
で、開発しています。

$ docker exec -it XXXXX /bin/bash

で、Railsのアプリに入り

$ rails s

でサーバーを立ち上げようとしても下記のエラー？が出てサーバーが立ち上がりません。

原因を教えていただけないでしょうか？

いつもは上手くサーバーが立ち上がっていました。

発生している問題・エラーメッセージ

Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /usr/local/bin/ruby
  -m, [--template=TEMPLATE]                              # Path to some application template (can be a filesystem path or URL)
  -d, [--database=DATABASE]                              # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/j
dbcsqlite3/jdbcpostgresql/jdbc)
                                                         # Default: sqlite3
  -j, [--javascript=JAVASCRIPT]                          # Preconfigure for selected JavaScript library

                                                         # Default: jquery
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfile
  -B, [--skip-bundle], [--no-skip-bundle]                # Don't run bundle install
  -G, [--skip-git], [--no-skip-git]                      # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                  # Skip source control .keep files
  -M, [--skip-action-mailer], [--no-skip-action-mailer]  # Skip Action Mailer files
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record files
  -P, [--skip-puma], [--no-skip-puma]                    # Skip Puma related files
  -C, [--skip-action-cable], [--no-skip-action-cable]    # Skip Action Cable files
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                # Don't install Spring application preloader
      [--skip-listen], [--no-skip-listen]                # Don't generate configuration that depends on the listen gem
  -J, [--skip-javascript], [--no-skip-javascript]        # Skip JavaScript files
      [--skip-turbolinks], [--no-skip-turbolinks]        # Skip turbolinks gem
  -T, [--skip-test], [--no-skip-test]                    # Skip test files
      [--dev], [--no-dev]                                # Setup the application with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                              # Setup the application with Gemfile pointing to Rails repository
      [--rc=RC]                                          # Path to file containing extra configuration options for rails command
      [--no-rc], [--no-no-rc]                            # Skip loading of extra configuration options from .railsrc file
      [--api], [--no-api]                                # Preconfigure smaller stack for API only apps

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist

Rails options:
  -h, [--help], [--no-help]        # Show this help message and quit
  -v, [--version], [--no-version]  # Show Rails version number and quit

Description:
    The 'rails new' command creates a new Rails application with a default
    directory structure and configuration at the path you specify.

    You can specify extra command-line arguments to be used every time
    'rails new' runs in the .railsrc configuration file in your home directory.

    Note that the arguments specified in the .railsrc file don't affect the
    defaults values shown above in this help message.

Example:
    rails new ~/Code/Ruby/weblog

    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.