Add Dockerfile for HuggingFace Spaces

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy app files
+COPY app.py .
+COPY .streamlit .streamlit
+
+# Expose port
+EXPOSE 7860
+
+# Run streamlit
+CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]