Prepare shop-ready deployment docs and fix transaction modal UI

README.md

@@ -81,6 +81,30 @@ Default seed admin (override via env in [docker-compose.yml](docker-compose.yml)
 - email: `admin@local.test`
 - password: `ChangeMe123!`
 
+## Shop deployment quickstart
+
+For a machine in the shop, use the full guide at [docs/SHOP_SETUP.md](docs/SHOP_SETUP.md).
+
+Fast path:
+
+```bash
+git clone https://github.com/Krikorios/OMT-SM.git
+cd OMT-SM
+
+cp .env.example .env
+cp server/.env.example server/.env
+
+npm install
+npm --prefix server install
+
+./scripts/start_prod.sh
+```
+
+Important:
+
+- Set strong secrets in `.env` and `server/.env` before first production use.
+- Match `POSTGRES_PASSWORD` in `.env` with the password inside `server/.env` `DATABASE_URL`.
+
 ## Tech stack
 
 React 18, TypeScript, Vite, shadcn/ui, Tailwind, TanStack Query, react-hook-form,