chore(server): use localhost sub domain (#13012)

reduce dnsmasq service



#### PR Dependency Tree


* **PR #13012** 👈

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

* **Documentation**
* Updated instructions to use the domain `affine.localhost` instead of
`dev.affine.fail`.
* Simplified setup steps by removing references to DNS service
configuration and custom DNS server entries.

* **Chores**
* Removed DNS server configuration and related files from the
development environment setup.
  * Updated example descriptions to reflect the new domain.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tools/cli/src/cert.ts

@@ -21,7 +21,7 @@ export class CertCommand extends Command {
 
   domain = Option.String('--domain', {
     description:
-      'Generate certificates for given domain. e.g. "dev.affine.fail"',
+      'Generate certificates for given domain. e.g. "affine.localhost"',
   });
 
   uninstall = Option.Boolean('--uninstall', {