docs: emphasize security layer in README

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# Immich Folio # Immich Folio
A self-hosted photography portfolio powered by [Immich](https://immich.app). Turns your Immich albums into a beautiful, public-facing gallery — no database required. A self-hosted photography portfolio powered by [Immich](https://immich.app). Turns your Immich albums into a beautiful, public-facing gallery — without ever exposing your Immich server to the internet.
Immich Folio acts as a **secure reverse proxy** between your visitors and your private Immich instance. Your Immich server stays on your local network, completely invisible to the outside world.
## Features ## Features
- **Portfolio-style navigation** — horizontal nav bar with all your collections - **Portfolio-style navigation** — horizontal nav bar with all your collections
- **Split hero homepage** — configurable hero image with navigation links - **Split hero homepage** — configurable hero image with navigation links
- **Subpage grouping** — organize albums under named collections (e.g. `/japan/tokyo-2023`) - **Subpage grouping** — organize albums under named collections (e.g. `/japan/tokyo-2023`)
- **Image proxy** — serves Immich assets without exposing your server or API key
- **Obfuscated URLs** — asset IDs are encrypted, never exposed to the public
- **Masonry photo grid** — responsive layout with lightbox viewer - **Masonry photo grid** — responsive layout with lightbox viewer
- **EXIF metadata** — camera, lens, and settings displayed on demand - **EXIF metadata** — camera, lens, and settings displayed on demand
- **Aggressive caching** — configurable TTL for fast repeat loads - **Aggressive caching** — configurable TTL for fast repeat loads
## Security
Immich Folio adds a full security layer between the public internet and your Immich instance:
| Concern | Protection |
|---------|-----------|
| **Server exposure** | Immich URL and port are never sent to the browser — all requests are proxied server-side |
| **API key** | Stored only in `.env.local`, never included in client-side code or responses |
| **Asset IDs** | Immich UUIDs are encrypted (AES-256) into opaque tokens — visitors cannot guess or enumerate asset IDs |
| **Album scope** | Only albums explicitly listed in `LIGHTBOX_ALBUMS` are accessible — everything else is blocked |
| **No direct access** | Visitors interact only with the Next.js app; they have zero knowledge of your Immich server's existence |
## Quick Start ## Quick Start
```bash ```bash