🚀 [Feature]: Add config option to Static config to disabled cache on Index routes

[nathanfaucett]

Feature Description

Add config option to Static config to disabled cache on Index routes, use case is single page apps that need the index.html files to use no-cache, no-store, must-revalidate or add a func to the Static config that allows the header to be customized based on the file or path.

Additional Context (optional)

No response

Code Snippet (optional)

package main

import "github.com/gofiber/fiber/v2"
import "log"

func main() {
  app := fiber.New()
  
  // custom function
  app.Static("/", "./.github", Static{CacheControl: func(c *Ctx) string {
    if strings.HasSuffix(c.Path(), "index.html") {
		return "no-cache, no-store, must-revalidate"
    } else {
		return ""
    }
  }})
  // or just a boolean to disable on index.html
  // would set the `Cache-Control` header to no-cache, no-store, must-revalidate for `index.html` files
  app.Static("/", "./.github", Static{IndexDisableCache: true}

  log.Fatal(app.Listen(":3000"))
}

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have checked for existing issues that describe my suggestion prior to opening this one.
• I understand that improperly formatted feature requests may be closed without explanation.

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