old_contents: # test.py
  def application(env, start_response):
      start_response('200 OK', [('Content-Type', 'text/html')])
      #return [b"Hello World"] # python3
      return ["Hello World from uwsgi-nginx:base"] # python2
  
new_contents: # test.py
  def application(env, start_response):
      start_response('200 OK', [('Content-Type', 'text/html')])
      #return [b"Hello World"] # python3
      return ["Hello World from default uWSGI app (default)"] # python2
  
subject: Add '(default)' to sample app