[ws-proxy] Add X-Forwarded-Port header

[felladrin]

Description

Add X-Forwarded-Port header, as it's required by some software, like FusionAuth.

Related Issue(s)

• This issue was reported by (M) Chakshu on Discord [1].
• Add Configuration for Reverse Proxy FusionAuth/fusionauth-issues#470

How to test

• Open a workspace on the Preview Environment of this PR.
• Run curl lama.sh | sh
• Run gp preview $(gp url 8080) --external to open a browser.
• Confirm you see, in the terminal logs of the request, the X-Forwarded-Port header. It should be the same port displayed at the end of X-Forwarded-Host header.
  

Release Notes

Requests on ws-proxy now contain also the `X-Forwarded-Port` header.

Documentation

None.

Werft options:

• /werft with-preview

[ChakshuGautam]

Hey @felladrin is it okay if we remove port suffix in the host here?

[felladrin]

Hey @felladrin is it okay if we remove port suffix in the host here?

I think that would be fine and seems correct to don't have a port there. Let me open a PR and start a discussion about it.