recipe: add pprof example 🔥

[mthli]

Is your feature request related to a problem?

Yes, but not fiber's problem, I think.

Describe the solution you'd like

I want to debug my Go project with net/http/pprof , so I writed a code snippet as below.

And I think it could be a recipe of fiber 😄

package main

import (
	"github.com/gofiber/fiber"
	"github.com/valyala/fasthttp/pprofhandler"
)

func main() {
	// Create new Fiber instance
	app := fiber.New()

	// Create new group route on path "/debug/pprof"
	app.Group("/debug/pprof", func(c *fiber.Ctx) {
		pprofhandler.PprofHandler(c.Fasthttp)
	})

	// Start server on http://localhost:3000
	app.Listen(3000)
}

If you visit http://localhost:3000/debug/pprof/ , everything is ok.

But if you visit http://localhost:3000/debug/pprof , the right subpath like http://localhost:3000/debug/pprof/goroutine will be replaced with the wrong subpath http://localhost:3000/debug/goroutine , so you will get nothing but 404.

Describe alternatives you've considered

It's because of pprof's template depends on the last / to separate different subpaths, so you should always visit http://localhost:3000/debug/pprof/ 😄

Additional context

Always use Safari to visit http://localhost:3000/debug/pprof to get 404.

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[Fenny]

https://github.com/gofiber/pprof 👍