def default_options
      {
        path: ENV['DOCKERFILE_PATH'] || '.',
        # Autoremove images in all CIs except Travis (not supported):
        rm: ci? && !travis_ci?,
        # Avoid CI timeout errors:
        log_level: ci? ? :ci : :silent
      }.merge(rspec_options)
    end
def default_options
      {
        path: ENV['DOCKERFILE_PATH'] || '.',
        # Autoremove images in all CIs except Travis (not supported):
        rm: ci? && !travis_ci?,
        # Avoid CI timeout errors:
        log_level: ci? ? :ci : :silent
      }.merge(rspec_options)
    end
Gets the default configuration options after merging them with RSpec
 configuration options.

 @example
   self.default_options #=> {:path=>".", :rm=>true, :log_level=>:silent}

 @return [Hash] The configuration options.

 @api private