title: How to stop flask app.run()?
body: <p>I made a flask app following flask's tutorial. After <code>python flaskApp.py</code>, how can I stop the app? I pressed <code>ctrl + c</code> in the terminal but I can still access the app through the browser. I'm wondering how to stop the app? Thanks.</p>
  
  <p>I even rebooted the vps. After the vps is restated, the app still is running!</p>