code: def marvcli_develop_server(port, public):
      
      from flask_cors import CORS
      app = create_app(push=False)
      app.site.load_for_web()
      CORS(app)
  
      class IPDBMiddleware(object):
          def __init__(self, app):
              self.app = app
  
          def __call__(self, environ, start_response):
              from ipdb import launch_ipdb_on_exception
              with launch_ipdb_on_exception():
                  appiter = self.app(environ, start_response)
                  for item in appiter:
                      yield item
  
      app.debug = True
      if IPDB:
          app.wsgi_app = IPDBMiddleware(app.wsgi_app)
          app.run(use_debugger=False,
                  use_reloader=False,
                  host=('0.0.0.0' if public else '127.0.0.1'),
                  port=port,
                  threaded=False)
      else:
          app.run(host=('0.0.0.0' if public else '127.0.0.1'),
                  port=port,
                  reloader_type='watchdog',
                  threaded=False)
docs: Run development webserver.
  
      ATTENTION: By default it is only served on localhost. To run it
      within a container and access it from the outside, you need to
      forward the port and tell it to listen on all IPs instead of only
      localhost.