FROM node:20-slim

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm install --production

# Copy application code
COPY . .

# Create cache directory with proper permissions
RUN mkdir -p /app/cache && chmod 777 /app/cache

# Hugging Face Spaces uses port 7860
ENV PORT=7860

# Anthropic API key for question generation
# Set this as a secret in your deployment platform (e.g., HF Spaces secrets)
ENV ANTHROPIC_API_KEY=""

# Expose the port
EXPOSE 7860

# Start the server
CMD ["node", "index.js"]