Convert to Docker SDK for HF Spaces

BREAKING: Complete migration from Gradio SDK to Docker SDK

This resolves all Gradio version compatibility issues by using Docker
to control the entire environment.

Changes:
- Created Dockerfile with Python 3.10 base image
- Pinned stable package versions (Gradio 3.50.2, Transformers 4.35.0)
- Updated README.md: sdk: docker, app_port: 7860
- Docker gives us full control over dependencies and environment

The app will now run in an isolated Docker container with guaranteed
compatible versions of all packages.

Dockerfile

@@ -0,0 +1,26 @@
+FROM python:3.10-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application files
+COPY app.py .
+
+# Expose Gradio default port
+EXPOSE 7860
+
+# Set environment variables
+ENV GRADIO_SERVER_NAME="0.0.0.0"
+
+# Run the application
+CMD ["python", "app.py"]

README.md

@@ -3,9 +3,8 @@ title: AI-Powered PDF Summarizer
 emoji: 📚
 colorFrom: blue
 colorTo: purple
-sdk: gradio
-sdk_version: 4.44.0
-app_file: app.py
+sdk: docker
+app_port: 7860
 pinned: false
 ---
 

requirements.txt

@@ -1,5 +1,5 @@
-gradio
-transformers
-torch
-PyMuPDF
-numpy<2
+gradio==3.50.2
+transformers==4.35.0
+torch==2.1.0
+PyMuPDF==1.23.8
+numpy==1.24.3