old_contents: #!/usr/bin/env python
  
  from flask_debugtoolbar import DebugToolbarExtension
  
  from app import app
  from app.models import connect_to_db
  
  
  if __name__ == '__main__':
  
      # debug = True as DebugToolbarExtension is invoked
  
      app.debug = True
      connect_to_db(app)
  
      # User the DebugToolbar
      # DebugToolbarExtension(app)
  
      app.run()
  
new_contents: #!/usr/bin/env python
  
  from flask_debugtoolbar import DebugToolbarExtension
  
  from app import app
  from app.models import connect_to_db
  
  
  if __name__ == '__main__':
  
      # debug = True as DebugToolbarExtension is invoked
  
      connect_to_db(app)
  
      # User the DebugToolbar
      # DebugToolbarExtension(app)
  
  	PORT = int(os.environ.get("PORT", 5000))
  
  	app.run(debug=True, host="0.0.0.0", port=PORT)
  
subject: Use Heroku post & open interface