Add dev/prod environments with TrueNAS Docker production deploy.

Split PostgreSQL into gallery_dev and gallery_prod, add Docker/Gitea deploy tooling,
SMB image sync, pgAdmin split script, dev:web on Keenetic :5173, and operator docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -7,6 +7,7 @@ Interactive virtual art gallery: zoomable historical timeline with era click-to-
 | Document | Purpose |
 |----------|---------|
 | [Documentation/basics.md](Documentation/basics.md) | Architecture, layout, user flow |
+| [Documentation/environments.md](Documentation/environments.md) | Dev/prod URLs, DB split, deploy, sync |
 | [Documentation/setup.md](Documentation/setup.md) | Install, env, npm scripts |
 | [Documentation/DB_structure.md](Documentation/DB_structure.md) | PostgreSQL tables |
 | [Documentation/API.md](Documentation/API.md) | REST endpoints |
@@ -19,7 +20,7 @@ Interactive virtual art gallery: zoomable historical timeline with era click-to-
 
 ## Setup
 
-1. Copy `.env.example` to `.env` and set database credentials.
+1. Copy `.env.example` to `.env` and set database credentials (`DB_NAME=gallery_dev` after [one-time split](Documentation/environments.md)).
 2. Install dependencies:
 
    ```bash
@@ -52,25 +53,36 @@ Interactive virtual art gallery: zoomable historical timeline with era click-to-
    npm run fetch-images -- --artist="Claude Monet"   # one artist in catalog order
    ```
 
-5. Build the client and start the server:
+5. **Development (public URL):**
 
    ```bash
-   npm run start:prod
+   npm run dev:web
    ```
 
-   **Production URLs:**
-   - Public: http://gallery.mysuperlab.netcraze.pro (via reverse proxy)
-   - LAN: http://192.168.10.70:3520
+   Open https://devgallery.mysuperlab.netcraze.pro (or http://localhost:5173 locally).
 
-   See [Documentation/setup.md](Documentation/setup.md#production-deployment) for nginx/systemd configs in `deploy/`.
+   **Production:** https://gallery.mysuperlab.netcraze.pro — see [Documentation/environments.md](Documentation/environments.md) and [infra/docker/DEPLOY-truenas.md](infra/docker/DEPLOY-truenas.md).
+
+## Deployed URLs
+
+| Environment | URL | Host |
+|-------------|-----|------|
+| Development | https://devgallery.mysuperlab.netcraze.pro | Dev PC `:5173` (Vite) + `:3451` (API) |
+| Production | https://gallery.mysuperlab.netcraze.pro | TrueNAS Docker `:5173` |
+
+Operator guide: [Documentation/environments.md](Documentation/environments.md).
 
 ## Development
 
-Run API and Vite dev server separately:
+**Public dev (Keenetic):**
 
 ```bash
-npm run dev:server   # API — PORT from .env (3520 or 3001)
-npm run dev:client   # http://localhost:5173 (proxies /api and /images)
+npm run dev:web   # Vite :5173, API :3451
 ```
 
-Both processes must run when the public domain is proxied to Vite (`deploy/nginx-gallery.conf`).
+**Local HMR:**
+
+```bash
+npm run dev:server   # API — PORT from .env
+npm run dev:client   # http://localhost:5173 (proxies /api and /images)
+```