old_contents: from flask import Flask
  from flask.ext.runner import Runner
  
  app = Flask(__name__)
  runner = Runner(app)
  
  @app.route('/')
  def hello():
      return "Hello World!"
  
  @app.route('/<name>')
  def hello_name(name):
      return "Hello {}!".format(name)
  
  if __name__=='__main__':
      runner.run()
  
  
new_contents: from flask import Flask
  from flask.ext.runner import Runner
  
  app = Flask(__name__)
  app.config.from_object(os.environ['APP_SETTINGS'])
  runner = Runner(app)
  
  @app.route('/')
  def hello():
      return "Hello World!"
  
  @app.route('/<name>')
  def hello_name(name):
      return "Hello {}!".format(name)
  
  if __name__=='__main__':
      runner.run()
  
  
subject: add config settings to app