[Question]: why i can not set defalut header as a global

[thearithchhie]

Bug Description

Hello Fiber Dev, why i can not set defalut header as a global

app.Use(func(c *fiber.Ctx) error {
   	c.Set("Content-Type", "application/json")
   	return c.Next()
   })

How to Reproduce

Steps to reproduce the behavior:

1. Go to '....'
2. Click on '....'
3. Do '....'
4. See '....'

Expected Behavior

Hello Fiber Dev, why i can not set defalut header as a global

app.Use(func(c *fiber.Ctx) error {
   	c.Set("Content-Type", "application/json")
   	return c.Next()
   })

Fiber Version

version 2

Code Snippet (optional)

No response

Checklist:

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

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[ReneWerner87]

@thearithchhie should be possible, what is the problem ? which bug exists ?

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