Type

Sets the Content-Type HTTP header to the MIME type listed here specified by the file extension.

func (c *Ctx) Type(ext string, charset ...string) *Ctx

app.Get("/", func(c *fiber.Ctx) error {
  c.Type(".html") // => "text/html"
  c.Type("html")  // => "text/html"
  c.Type("png")   // => "image/png"
  c.Type("json", "utf-8")  // => "application/json; charset=utf-8"
  // ...
})