def check_services(first_file)
      if first_file.start_with?('service:')
        service = first_file.sub(/service:/, '')
        SERVICES.each do |k,v|
          if k == service
            @files = v
          end
        end
      end
    end
def check_services(first_file)
      if first_file.start_with?('service:')
        service = first_file.sub(/service:/, '')
        SERVICES.each do |k,v|
          if k == service
            @files = v
          end
        end
      end
    end
Check if the first file matches service:<service-name>
 and try to determine the files based on the service.

 first_file the first file given