Add CLI, Docker setup, and quick start guide

- CLI tool for testing (cli.py)
- Docker Compose for easy deployment
- Dockerfile for backend
- QUICKSTART.md with setup instructions

Ready to deploy! Run: python cli.py or docker-compose up

docker/Dockerfile.backend

@@ -0,0 +1,25 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies for WeasyPrint (PDF generation)
+RUN apt-get update && apt-get install -y \
+    libpango-1.0-0 \
+    libpangoft2-1.0-0 \
+    libgdk-pixbuf2.0-0 \
+    libffi-dev \
+    shared-mime-info \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install Python dependencies
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY backend/ .
+
+# Expose port
+EXPOSE 8000
+
+# Run the application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]