add Dockerfile for HF spaces

Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.11-slim  
+  
+WORKDIR /app  
+  
+# Install system dependencies  
+RUN apt-get update && apt-get install -y \  
+    curl \  
+    && rm -rf /var/lib/apt/lists/*  
+  
+# Copy existing requirements and install Python dependencies  
+COPY requirements.txt .  
+RUN pip install --no-cache-dir -r requirements.txt  
+  
+# Copy application code  
+COPY . .  
+  
+# Expose port (HF Spaces uses 7860)  
+EXPOSE 7860  
+  
+# Command to run the app  
+CMD ["uvicorn", "src.proxy_app.main:app", "--host", "0.0.0.0", "--port", "7860"]