diff --git a/README.md b/README.md
index 1bb4f69..909cef3 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1 @@
-# Fizika - Physics Quiz Application
-
-A comprehensive physics quiz application for Hungarian students preparing for their physics exams (érettségi). The application consists of a frontend quiz interface and an admin backend for content management.
-
-## 🚀 Features
-
-### Student Interface (Frontend)
-
-- Interactive physics quiz questions
-- Multiple choice questions with immediate feedback
-- Category-based filtering (dynamics, mechanics, fluids, etc.)
-- Search functionality by year, month, and question number
-- Responsive design for desktop and mobile
-- Progress tracking and scoring
-- Timer functionality
-
-### Admin Interface (Backend)
-
-- 📝 Full CRUD operations for quiz questions
-- 🖼️ Image management (upload, view, delete)
-- 📊 RESTful API for frontend integration
-- 🛡️ Basic security features (input validation)
-- 🐳 Docker containerization ready
+# Fizika
diff --git a/backend/CLAUDE.md b/backend/CLAUDE.md
deleted file mode 100644
index 124ed9c..0000000
--- a/backend/CLAUDE.md
+++ /dev/null
@@ -1,134 +0,0 @@
-# CLAUDE.md
-
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
-
-## Common Development Commands
-
-### Running the Application
-```bash
-npm run dev    # Development mode with nodemon hot reload
-npm start      # Production mode
-```
-
-### Docker Commands
-```bash
-# Production deployment
-docker-compose up -d
-
-# Development with hot reload
-docker-compose --profile dev up fizika-admin-dev
-
-# Build image manually
-docker build -t fizika-admin ./backend
-```
-
-### Environment Setup
-```bash
-cp .env.example .env
-# Edit .env with your configuration
-```
-
-## Architecture Overview
-
-This is a single-file Node.js/Express backend (`server.js`) that serves as both:
-1. **API Server**: Provides REST endpoints for question and image management
-2. **Static File Server**: Serves the admin interface from `/public/` directory
-
-### Key Components
-
-**Data Storage**: 
-- Questions stored in JSON file at `../frontend/fizika.json` (configurable via `DATA_PATH`)
-- Images stored in `../frontend/pics/` directory (configurable via `PICS_PATH`)
-
-**Admin Interface**:
-- Built-in web UI served from `/public/index.html`
-- JavaScript client in `/public/admin.js`
-- No authentication required (simplified for admin use)
-
-**API Structure**:
-- Public endpoints: `/api/fizika`, `/api/images`, `/api/pics/:filename`
-- Admin endpoints: `/api/admin/questions`, `/api/admin/images`
-- No JWT authentication implemented despite README documentation
-
-### Question Data Format
-```json
-{
-  "id": 1,
-  "source": "2016/m1/1",
-  "description": "Question text...",
-  "a": "Option A",
-  "b": "Option B", 
-  "c": "Option C",
-  "d": "Option D",
-  "correct": 2,
-  "type": "md",
-  "image": "optional-image.jpg"
-}
-```
-
-### Complete Question Types (17 Categories)
-
-**IMPORTANT**: The README only mentions 3 types, but the frontend supports all 17:
-
-**Mechanics (Mechanika)**:
-- `mec` - Mechanika (general mechanics)
-- `mk` - Kinematika (kinematics)
-- `md` - Dinamika (dynamics)
-- `me` - Munka és energia (work and energy)
-- `mf` - Folyadékok és gázok mechanikája (fluid mechanics)
-- `mr` - Rezgések és hullámok (oscillations and waves)
-
-**Thermodynamics**:
-- `h` - Hőtan (thermodynamics)
-
-**Electricity**:
-- `ele` - Elektromosság (general electricity)
-- `es` - Elektrosztatika (electrostatics)
-- `ee` - Egyenáram (direct current)
-- `ev` - Váltakozó áram (alternating current)
-
-**Other Physics**:
-- `m` - Mágnesesség (magnetism)
-- `o` - Fénytan (optics)
-- `atm` - Atomfizika (general atomic physics)
-- `ah` - Atomhéj (electron shells)
-- `am` - Atommag (atomic nucleus)
-- `cs` - Égi mechanika, csillagászat (celestial mechanics, astronomy)
-- `v` - Vegyes (mixed/various)
-
-### Security Considerations
-- Helmet.js for security headers
-- CORS configuration via `FRONTEND_URL` environment variable
-- File upload restricted to images only (5MB limit)
-- Input validation minimal - add validation when modifying endpoints
-
-## File Structure
-```
-backend/
-├── server.js           # Main application file
-├── public/
-│   ├── index.html     # Admin interface HTML
-│   └── admin.js       # Admin interface JavaScript
-├── package.json
-├── Dockerfile
-├── docker-compose.yml
-└── .env.example
-```
-
-## Important Notes
-
-- **Single File Architecture**: All server logic is in `server.js` - no separate route files or modules
-- **File-based Data**: Uses JSON file for persistence, not a database
-- **No Authentication**: Despite README documentation mentioning JWT, no auth is implemented
-- **Path Dependencies**: Assumes frontend directory structure (`../frontend/fizika.json`, `../frontend/pics/`)
-- **Admin UI Included**: Built-in web interface accessible at root path `/`
-- **Question Types**: Support all 17 physics categories listed above, not just the 3 in README
-
-## Making Changes
-
-When modifying the API:
-1. All changes go in `server.js`
-2. Test both API endpoints and admin UI functionality
-3. Ensure question type validation supports all 17 categories if adding validation
-4. Consider impact on file paths and data format
-5. Update environment variables in `.env.example` if needed
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diff --git a/backend/Dockerfile b/backend/Dockerfile
index e267374..4df2b9e 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -17,7 +17,6 @@ ENV NODE_ENV=production
 ENV PORT=3001
 EXPOSE 3001
 
-# Health check
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
     CMD node -e "require('http').get('http://localhost:3001/api/fizika', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) }).on('error', () => process.exit(1))"
 
diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
deleted file mode 100644
index a72505e..0000000
--- a/backend/docker-compose.yml
+++ /dev/null
@@ -1,70 +0,0 @@
-version: '3.8'
-
-services:
-  fizika-admin:
-    build:
-      context: ./backend
-      dockerfile: Dockerfile
-    ports:
-      - "3001:3001"
-    environment:
-      - NODE_ENV=production
-      - PORT=3001
-      - FRONTEND_URL=${FRONTEND_URL:-*}
-      - DATA_PATH=${DATA_PATH:-/usr/src/app/fizika.json}
-      - PICS_PATH=${PICS_PATH:-/usr/src/app/pics}
-    volumes:
-      # Mount data files
-      - ./fizika.json:/usr/src/app/fizika.json:ro
-      - ./pics:/usr/src/app/pics
-      # Optional: mount for development
-      # - ./backend:/usr/src/app
-    restart: unless-stopped
-    healthcheck:
-      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3001/api/fizika', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) }).on('error', () => process.exit(1))"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
-      start_period: 40s
-
-  # Optional: Development service with hot reload
-  fizika-admin-dev:
-    build:
-      context: ./backend
-      dockerfile: Dockerfile
-      target: dev-dependencies
-    ports:
-      - "3001:3001"
-    environment:
-      - NODE_ENV=development
-      - PORT=3001
-      - FRONTEND_URL=*
-      - DATA_PATH=/usr/src/app/fizika.json
-      - PICS_PATH=/usr/src/app/pics
-    volumes:
-      - ./backend:/usr/src/app
-      - ./fizika.json:/usr/src/app/fizika.json
-      - ./pics:/usr/src/app/pics
-      - /usr/src/app/node_modules
-    command: npm run dev
-    profiles: ["dev"]
-
-  # Optional: Nginx reverse proxy for production
-  nginx:
-    image: nginx:alpine
-    ports:
-      - "80:80"
-      - "443:443"
-    volumes:
-      - ./nginx.conf:/etc/nginx/nginx.conf:ro
-      - .:/usr/share/nginx/html:ro
-      # SSL certificates (if using HTTPS)
-      # - ./ssl:/etc/ssl/certs
-    depends_on:
-      - fizika-admin
-    restart: unless-stopped
-    profiles: ["nginx"]
-
-networks:
-  default:
-    name: fizika-network
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