No operations defined in spec!

[learncodingforweb]

not able to view any urls
even tried example provided.
Here is the code

package main

import (
	"log"

	"github.com/gofiber/fiber/v2"
	fiberSwagger "github.com/swaggo/fiber-swagger"

	_ "github.com/swaggo/fiber-swagger/example/docs" // docs is generated by Swag CLI, you have to import it.
)

// @title Swagger Example API
// @version 1.0
// @description This is a sample server Petstore server.
// @termsOfService http://swagger.io/terms/

// @contact.name API Support
// @contact.url http://www.swagger.io/support
// @contact.email [email protected]

// @license.name Apache 2.0
// @license.url http://www.apache.org/licenses/LICENSE-2.0.html

// @host petstore.swagger.io
// @BasePath /v2
func main() {
	app := fiber.New()

	app.Get("/swagger/*", fiberSwagger.WrapHandler)

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("home")
	})

	app.Get("/news", func(c *fiber.Ctx) error {
		return c.SendString("news")
	})

	err := app.Listen(":4000")
	if err != nil {
		log.Fatalf("fiber.Listen failed %s", err)
	}
}

after the i had given swag init
How can i view urls list of urls in swagger docs