feat: 后端初始化

supplied-service/README.md

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+# supplied-service
+
+Netlify Functions backend for the supplied mall H5 project.
+
+## Stack
+
+- Netlify Functions
+- TypeScript
+- Prisma ORM
+- Neon Postgres
+- `@prisma/adapter-neon` + `@neondatabase/serverless`
+
+## Directory
+
+```text
+netlify/
+  functions/        # API entrypoints
+  utils/            # shared function utilities
+  types/            # shared API types
+prisma/
+  schema.prisma     # Prisma models
+```
+
+## Environment
+
+Copy `.env.example` to `.env` and set:
+
+- `DATABASE_URL`: pooled Neon connection string for Netlify Functions runtime
+- `DIRECT_URL`: direct Neon connection string for Prisma CLI and migrations
+- `JWT_SECRET`: auth signing secret
+- `UPLOAD_TOKEN`: upload guard token
+
+## Scripts
+
+```bash
+npm run dev
+npm run build
+npm run typecheck
+npm run prisma:generate
+npm run prisma:migrate
+npm run prisma:studio
+```
+
+## Function Routes
+
+Netlify exposes functions under `/.netlify/functions/<name>`.
+
+Current placeholders:
+
+- `login`
+- `product-list`
+- `product-detail`
+- `cart-add`
+- `order-create`
+- `order-pay`
+- `user-info`
+- `upload`