Serve can broke nextcloud on chrome

### What is the issue?

When i deploy a nextcloud instance via the linux io image (not AIO) with tailscale as sidecar (network set on service:ts-nextcloud.
Extension cannot be installed (CSP remote set to self) on chrome (brave more exactly (yes i tried to disable the shield)) yet on safari it work

If i made a configuration mistake thanks to point it out =)

Also have not linked a "bug report" as there is no "bug" in the app itself it's the CSP that "serve" give that broke it.

### Steps to reproduce

install nextcloud on docker with compose from : https://docs.linuxserver.io/images/docker-nextcloud/

add sidecar tailscale and use serve to access https+insecure://127.0.0.1:443, set it up and try to enable an extension from chrome (error server instable), open safari on the same https://computer.tailnet.ts.net and try the same it work

Also have not linked a "bug report" as there is no "bug" in the app itself it's the CSP that "serve" give that broke it.

### Are there any recent changes that introduced the issue?

unknown but having a way to force disable or modify the CSP with server could let us fix this kind of issue.

Also have not linked a "bug report" as there is no "bug" in the app itself it's the CSP that "serve" give that broke it.

### OS

macOS

### OS version

Docker (from official image)

### Tailscale version

1.82.0

### Other software

_No response_

### Bug report

_No response_