Feat v0.6.1-v0.6.2: backup/restore, docs surface, dynamic OpenAPI

v0.6.1 — Backup tooling (.swb ZIP export/import), admin backup section,
docs surface with markdown rendering, 5 reference docs, 6 handler tests.

v0.6.2 — Dark mode contrast fixes, topbar nav, 📖 docs icon, dynamic
OpenAPI spec with extension route merging, docs outline sidebar,
scroll/routing fixes; 7 new tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/GETTING-STARTED.md

@@ -0,0 +1,91 @@
+# Getting Started
+
+## Prerequisites
+
+- Docker and Docker Compose
+
+## Running with Docker Compose
+
+```bash
+docker compose up --build
+```
+
+Open [http://localhost:3000](http://localhost:3000). Default credentials: `admin` / `admin`.
+
+Data persists in the `sb_data` named volume. To reset everything:
+
+```bash
+docker compose down -v
+```
+
+## First Boot
+
+On first start, Switchboard Core will:
+
+1. Run database migrations (SQLite by default in compose).
+2. Create the admin user from `SWITCHBOARD_ADMIN_USERNAME` / `SWITCHBOARD_ADMIN_PASSWORD` env vars.
+3. Auto-install the curated default package set (notes, chat-core, dashboard, workflow demos, etc.).
+
+No manual setup steps are required.
+
+## Installing Additional Packages
+
+The Docker image ships with extra packages beyond the default set. To install them:
+
+- **Via Admin UI**: Go to `/admin` > Packages. Browse, enable, or install packages.
+- **Via environment variable**: Set `BUNDLED_PACKAGES` before starting:
+
+```bash
+# Install all bundled packages
+BUNDLED_PACKAGES="*" docker compose up --build
+
+# Install specific extras
+BUNDLED_PACKAGES="notes,tasks,schedules" docker compose up --build
+```
+
+You can also upload `.pkg` archives through the Admin > Packages page.
+
+## Key URLs
+
+| URL | Purpose |
+|-----|---------|
+| `/` | Redirects to your default surface |
+| `/admin` | Admin panel (users, packages, settings, teams) |
+| `/settings` | User settings (profile, preferences, default surface) |
+| `/welcome` | Welcome page (shown when no surfaces are installed) |
+| `/api/docs` | Interactive OpenAPI documentation |
+
+## Key Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `PORT` | `8080` | Backend API port |
+| `DB_DRIVER` | auto | `postgres` or `sqlite` |
+| `DATABASE_URL` | | PostgreSQL DSN or SQLite file path |
+| `JWT_SECRET` | `dev-secret-change-me` | **Change in production** |
+| `ENCRYPTION_KEY` | | AES-256 key for credential encryption |
+| `AUTH_MODE` | `builtin` | `builtin`, `mtls`, or `oidc` |
+| `STORAGE_BACKEND` | auto | `pvc` or `s3` |
+| `STORAGE_PATH` | `/data/storage` | PVC mount point |
+| `SWITCHBOARD_ADMIN_USERNAME` | | Bootstrap admin username |
+| `SWITCHBOARD_ADMIN_PASSWORD` | | Bootstrap admin password |
+| `BUNDLED_PACKAGES` | (empty) | `""` = curated defaults, `"*"` = all, or comma-separated IDs |
+| `SKIP_BUNDLED_PACKAGES` | `false` | Disable auto-install entirely |
+| `LOG_LEVEL` | `info` | `debug`, `info`, `warn`, `error` |
+| `LOG_FORMAT` | `text` | `text` or `json` |
+
+## From Source
+
+```bash
+git clone <repo-url> && cd switchboard-core
+cp server/.env.example server/.env   # edit DB credentials
+cd server && go run .
+# Backend on http://localhost:8080
+```
+
+## Next Steps
+
+- [Extension Guide](EXTENSION-GUIDE.md) -- Author your own packages
+- [API Reference](API-REFERENCE.md) -- REST API overview
+- [Deployment](DEPLOYMENT.md) -- Production deployment
+- [Architecture](ARCHITECTURE.md) -- System design