Fix domain format to match desired pattern

Changed from double subdomain format (anna.recruitai.startanaicompany.com)
to single concatenated format (annarecruit.startanaicompany.com).

Changes:
- deploy-to-coolify.example.sh: Updated FULL_DOMAIN to ${SUBDOMAIN}recruit.startanaicompany.com
- .env.example: Updated comment to show correct example (annarecruit.startanaicompany.com)
- README.md: Updated domain examples to use correct format
- COOLIFY_SETUP.md: Updated all DNS and domain examples to use correct format

This ensures deployments generate domains like:
- annarecruit.startanaicompany.com (when SUBDOMAIN=anna)
- johnrecruit.startanaicompany.com (when SUBDOMAIN=john)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -105,7 +105,7 @@ chmod +x deploy-to-coolify.sh
 
 The script will:
 - Create a Coolify application
-- Configure domain (yourname.recruitai.startanaicompany.com)
+- Configure domain (yournamerecruit.startanaicompany.com)
 - Set up webhooks for automatic deployments
 - Generate database and session secrets
 - Trigger initial deployment