updated Readme

README.md

@@ -1,6 +1,91 @@
 # Schichtenplaner
-Aufteilung der Schichten unter Mitarbeitern
 
+A web application for planning and distributing work shifts among employees. Manage your team's schedules, handle employee availability, and automatically generate optimized shift plans.
+
+## Features
+
+- Employee management with availability tracking
+- Shift plan creation and management
+- Automated scheduling optimization using constraint programming (OR-Tools CP-SAT)
+- Excel export functionality
+- User authentication with JWT
+- Responsive web interface
+
+---
+
+## For Developers
+
+### Tech Stack
+
+**Frontend:**
+- React 19 with TypeScript
+- Vite 6 (build tool & dev server)
+- React Router DOM (routing)
+- date-fns (date handling)
+- Framer Motion (animations)
+
+**Backend:**
+- Express.js with TypeScript
+- SQLite3 (database)
+- JWT authentication
+- Helmet (security headers)
+- express-rate-limit (rate limiting)
+- OR-Tools CP-SAT (Python - scheduling optimization)
+- ExcelJS (Excel exports)
+
+**Infrastructure:**
+- npm workspaces (monorepo)
+- Docker support
+
+### Prerequisites
+
+- Node.js (v18+)
+- Python 3 with OR-Tools (`pip install ortools`)
+- npm
+
+### Getting Started
+
+```bash
+# Install dependencies
+npm install
+
+# Run development server (frontend + backend)
+npm run dev
+
+# Build all packages
+npm run build:all
+```
+
+### Project Structure
+
+```
+schichtenplaner/
+├── frontend/     # React application
+├── backend/      # Express API server
+├── premium/      # Premium features (optional)
+└── package.json  # Root monorepo config
+```
+
+### Available Scripts
+
+| Command | Description |
+|---------|-------------|
+| `npm run dev` | Start both frontend and backend in development mode |
+| `npm run dev:frontend` | Start frontend only |
+| `npm run dev:backend` | Start backend only |
+| `npm run build:all` | Build frontend and backend |
+| `npm run docker:build` | Build Docker image |
+| `npm run docker:run` | Run Docker container |
+
+### Environment Variables
+
+The backend requires these environment variables in production:
+- `NODE_ENV` - Set to `production` or `development`
+- `JWT_SECRET` - Secret key for JWT token signing
+- `TRUST_PROXY_ENABLED` - Enable/disable proxy trust (default: true)
+- `TRUSTED_PROXY_IPS` - Comma-separated list of trusted proxy IPs
+
+---
 
 ## 🧾 License