production docker deployment update

README.md

@@ -26,6 +26,18 @@ City A/B/C (API+DB) --API key sync--> HQ mirror API+DB --session--> Executive FE
 | Site `dashboard-cpsp` | `:3001` | `:8000` |
 | HQ `dashboard-cpsp-executive` | `:3002` | `:8001` |
 
+## Production (Docker)
+
+Same Compose layout as the site app. On the HQ host: UI **:80**, API debug **:18001**, Postgres **:15433**.
+
+```bash
+cp docker/.env.example .env
+# set SECRET_KEY, DB_PASSWORD, BOOTSTRAP_ADMIN_PASSWORD
+docker compose up -d --build
+```
+
+See [DOCKER.md](DOCKER.md) for architecture, env vars, cron, and ops commands.
+
 ## Setup
 
 **Backend**