- Add gitea/backup.sh and gitea/restore.sh
- Move hardcoded values in gitea/docker-compose.yml to gitea/.env
- Move immich .env from root to immich-app/, update env_file path
- Remove root docker-compose.yml (was only an include alias)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
