Add Dockerfile and update README.md to use docker SDK

Dockerfile

@@ -0,0 +1,17 @@
+FROM python:3.9-slim
+
+WORKDIR /app
+
+COPY . /app/
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Make port 7860 available (Hugging Face Spaces uses this port)
+EXPOSE 7860
+
+# Set environment variables
+ENV PORT=7860
+ENV HOST=0.0.0.0
+
+# Run the application
+CMD ["gunicorn", "--bind", "0.0.0.0:7860", "app:app"] 

README.md

@@ -3,8 +3,8 @@ title: Book Title Analyzer
 emoji: 📚
 colorFrom: blue
 colorTo: green
-sdk: gradio
-sdk_version: "3.50.2"
+sdk: docker
+sdk_version: "1.0"
 app_file: app.py
 pinned: false
 ---