Support separate auth domain (e.g. auth.cameleer.io) for Logto while
keeping the SaaS app on PUBLIC_HOST (e.g. app.cameleer.io). AUTH_HOST
defaults to PUBLIC_HOST for backward-compatible single-domain setups.
- Logto routing: Host(AUTH_HOST) replaces PathPrefix('/') catch-all
- Root redirect moved from traefik-dynamic.yml to Docker labels with
Host(PUBLIC_HOST) scope so it doesn't intercept auth domain
- Self-signed cert generates SANs for both domains
- Bootstrap Host header uses AUTH_HOST for Logto endpoint validation
- Spring issuer-uri and oidcissueruri use new authhost property
- Both installers (sh + ps1) prompt for AUTH_HOST in expert mode
Local dev: AUTH_HOST=auth.localhost (resolves to 127.0.0.1, no hosts file)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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