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 support@swagger.io

// @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