Update Dockerfile

Dockerfile

@@ -1,18 +1,14 @@
-# Use an official Python runtime as a parent image
 FROM python:3.9-slim
 
-# Set the working directory
 WORKDIR /app
-
-# Copy the application files to the container
 COPY . /app
 
-# Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
+ENV PYTHONUNBUFFERED=1
 
+# install dependencies (ensure requirements.txt contains gunicorn)
+RUN pip install --no-cache-dir -r requirements.txt
 
-# Expose the Flask port (Hugging Face Spaces uses port 7860 by default)
 EXPOSE 7860
 
-# Command to run the Flask app
-CMD ["python", "app.py"]
+# Use shell form to allow ${PORT:-7860} expansion
+CMD ["sh", "-c", "gunicorn -w 1 -b 0.0.0.0:${PORT:-7860} app:app"]