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ADMIN-README.md

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+# Admin Login System
+
+This document provides information about the admin login system for the PP Kunovice web application.
+
+## Default Admin Credentials
+
+- **Username**: `admin`
+- **Password**: `admin123`
+
+**Important**: Change the default password after the first login in a production environment.
+
+## Accessing the Admin Panel
+
+1. Navigate to `/admin` in your web browser
+2. Enter the admin credentials
+3. After successful login, you'll be redirected to the admin dashboard
+
+## API Endpoints
+
+### Login
+- **URL**: `/api/login`
+- **Method**: `POST`
+- **Content-Type**: `application/json`
+- **Request Body**:
+  ```json
+  {
+    "username": "admin",
+    "password": "admin123"
+  }
+  ```
+- **Success Response**:
+  - **Code**: 200 OK
+  - **Content**:
+    ```json
+    {
+      "token": "jwt.token.here"
+    }
+    ```
+- **Error Response**:
+  - **Code**: 401 Unauthorized
+  - **Content**:
+    ```json
+    {
+      "error": "Invalid credentials"
+    }
+    ```
+
+### Protected Endpoints
+
+All protected endpoints require a valid JWT token in the `Authorization` header:
+
+```
+Authorization: Bearer <token>
+```
+
+## Environment Variables
+
+- `JWT_SECRET`: Secret key used to sign JWT tokens (default: auto-generated)
+- `PORT`: Port the server listens on (default: 80)
+
+## Security Notes
+
+1. Always use HTTPS in production
+2. Change the default admin password
+3. Set a strong `JWT_SECRET` environment variable in production
+4. Consider implementing rate limiting for login attempts
+5. Keep the server and dependencies up to date
+
+## Development
+
+To run the server in development mode:
+
+```bash
+go run .
+```
+
+The admin interface will be available at `http://localhost/admin`