new_contents: import os
  
  from flask import Flask, abort, send_file
  
  app = Flask(__name__)
  
  
  @app.route("/<path:filename>/")
  def get_image(filename):
      if not os.path.isfile(filename):
          abort(404)
      return send_file(filename)
  
  
  if __name__ == "__main__":
      app.run()
  
subject: Add functionality: photo or 404