old_contents: from flask import Flask
  app = Flask(__name__)
  
  @app.route("/")
  def hello():
      return "Hi, I am Ugur!"
  
  if __name__ == "__main__":
      app.run()
  
  
new_contents: from flask import Flask
  app = Flask(__name__)
  
  @app.route("/")
  def hello():
      return "Hi, I am Ugur!"
  
  if __name__ == "__main__":
      app.run(host='0.0.0.0', port=8080)
  
  
subject: Update app.py