feat(server): support multiple hosts in one deployment (#12950)

close CLOUD-233



#### PR Dependency Tree


* **PR #12950** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added support for configuring multiple server hosts across backend and
frontend settings.
* Enhanced deployment and Helm chart configuration to allow specifying
multiple ingress hosts.
* Updated admin and configuration interfaces to display and manage
multiple server hosts.

* **Improvements**
* Improved URL generation, OAuth, and worker service logic to
dynamically handle requests from multiple hosts.
  * Enhanced captcha verification to support multiple allowed hostnames.
* Updated frontend logic for platform-specific server base URLs and
allowed origins, including Apple app domains.
  * Expanded test coverage for multi-host scenarios.

* **Bug Fixes**
* Corrected backend logic to consistently use dynamic base URLs and
origins based on request host context.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/admin/src/config.json

@@ -171,6 +171,10 @@
       "desc": "Where the server get deployed(FQDN).",
       "env": "AFFINE_SERVER_HOST"
     },
+    "hosts": {
+      "type": "Array",
+      "desc": "Multiple hosts the server will accept requests from."
+    },
     "port": {
       "type": "Number",
       "desc": "Which port the server will listen on.",

packages/frontend/admin/src/modules/settings/config.ts

@@ -48,7 +48,7 @@ export const KNOWN_CONFIG_GROUPS = [
   {
     name: 'Server',
     module: 'server',
-    fields: ['externalUrl', 'name'],
+    fields: ['externalUrl', 'name', 'hosts'],
   } as ConfigGroup<'server'>,
   {
     name: 'Auth',