Update docs, configs, and scripts

Co-Authored-By: Oz <oz-agent@warp.dev>

README.md

@@ -57,16 +57,17 @@ Detailed architecture: `docs/ARCHITECTURE.md`.
    cd gemma3-vllm-stack
    ```
 
-2. Create configuration files:
+2. Create the main configuration file:
    ```bash
    cp .env.example .env
-   cp backend/config/model.env.example backend/config/model.env
-   cp frontend/config/frontend.env.example frontend/config/frontend.env
    ```
 
 3. Edit `.env` and set at least:
    - `HF_TOKEN`
    - `VLLM_API_KEY` (recommended even on LAN)
+   - `GEMMA_MODEL_ID`
+
+   `backend/config/model.env` and `frontend/config/frontend.env` are auto-synced from `.env` by `scripts/install.sh` and `scripts/restart.sh`.
 
 4. Install/start stack:
    ```bash
@@ -124,3 +125,7 @@ Adjust using `.env`:
 
 ## Notes for `chat.bhatfamily.in`
 This repository intentionally does not terminate TLS. Bindings are plain HTTP on host ports and are designed for external reverse proxy + TLS handling (nginx/Caddy/Cloudflare Tunnel).
+
+Current homelab edge mapping (verified 2026-04-19):
+- `https://chat.bhatfamily.in` is served on `443/tcp` by the shared Caddy edge.
+- Direct host ports `3000/tcp` (UI) and `8000/tcp` (API) are currently publicly reachable; restrict firewall/NAT exposure if direct internet access is not intended.