```ruby
version = '3.0.0'

Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'spree_multi_domain'
  s.version     = version
  s.summary     = 'Adds multiple site support to Spree'
  #s.description = 'Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments.'
  s.required_ruby_version = '>= 1.8.7'

  # s.author            = 'David Heinemeier Hansson'
  # s.email             = 'david@loudthinking.com'
  # s.homepage          = 'http://www.rubyonrails.org'
  # s.rubyforge_project = 'actionmailer'

  s.files        = Dir['CHANGELOG', 'README', 'MIT-LICENSE', 'lib/**/*', 'app/**/*']
  s.require_path = 'lib'
  s.requirements << 'none'

  s.has_rdoc = true

  s.add_dependency('spree_core',  '0.30.0.beta1')
end
```

Include config dir files in gemspec
user
```ruby
version = '3.0.1'

Gem::Specification.new do |s|
  s.platform    = Gem::Platform::RUBY
  s.name        = 'spree_multi_domain'
  s.version     = version
  s.summary     = 'Adds multiple site support to Spree'
  #s.description = 'Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments.'
  s.required_ruby_version = '>= 1.8.7'

  # s.author            = 'David Heinemeier Hansson'
  # s.email             = 'david@loudthinking.com'
  # s.homepage          = 'http://www.rubyonrails.org'
  # s.rubyforge_project = 'actionmailer'

  s.files        = Dir['CHANGELOG', 'README', 'MIT-LICENSE', 'lib/**/*', 'app/**/*', 'config/*']
  s.require_path = 'lib'
  s.requirements << 'none'

  s.has_rdoc = true

  s.add_dependency('spree_core',  '0.30.0.beta1')
end
```
assistant