Add AI Quiz Bot files

Dockerfile

@@ -16,7 +16,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy application code
 COPY bot.py .
-COPY .env .
+
+# Environment variables are injected by HF Spaces via Secrets
+# Do NOT copy .env - it contains secrets and should never be in the repo
 
 # Create a non-root user for security
 RUN useradd -m -u 1000 botuser && chown -R botuser:botuser /app
@@ -24,3 +26,4 @@ USER botuser
 
 # Run the bot
 CMD ["python", "bot.py"]
+CMD ["python", "bot.py"]