Added docker file for containerization

Dockerfile

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+# Use an official Python image
+FROM python:3.12-slim
+
+# Set working directory
+WORKDIR /app
+
+# Create a cache directory with proper permissions
+RUN mkdir -p /data/.cache/huggingface && chmod -R 777 /data
+
+# Set environment variables for Hugging Face cache
+ENV HF_HOME=/data/.cache/huggingface
+ENV TRANSFORMERS_CACHE=/data/.cache/huggingface/transformers
+ENV HF_DATASETS_CACHE=/data/.cache/huggingface/datasets
+
+# Copy code
+COPY . .
+
+# Install dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Expose the port
+EXPOSE 7860
+
+# Run the FastAPI app
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]