DockerFile

### 2. `Dockerfile`
*(This tells Hugging Face how to build the Python environment)*
```dockerfile
FROM python:3.9-slim

WORKDIR /app

# Install dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY main.py .

# Expose the port FastAPI runs on
EXPOSE 7860

# Run the app
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]