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 -->

.docker/selfhost/schema.json

@@ -540,6 +540,11 @@
           "description": "Where the server get deployed(FQDN).\n@default \"localhost\"\n@environment `AFFINE_SERVER_HOST`",
           "default": "localhost"
         },
+        "hosts": {
+          "type": "array",
+          "description": "Multiple hosts the server will accept requests from.\n@default []",
+          "default": []
+        },
         "port": {
           "type": "number",
           "description": "Which port the server will listen on.\n@default 3010\n@environment `AFFINE_SERVER_PORT`",