new_contents: from flask import Flask
  
  import os
  
  
  app = Flask(__name__)
  app.debug = True
  
  # Secret Key setting based on debug setting
  if app.debug:
      app.secret_key = "T3st_s3cret_k3y!~$@"
  else:
      app.secret_key = os.urandom(30)
  
  
  @app.route("/")
  def index():
      return "Index Page"
  
  
  if __name__ == "__main__":
      app.run(host="0.0.0.0", threaded=True)
  
subject: Add flask web file