Update Dockerfile

Dockerfile

@@ -10,5 +10,12 @@ COPY --chown=user ./requirements.txt requirements.txt
 RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
 COPY --chown=user . /app
-EXPOSE 5000
-CMD ["flask", "run", "--port", "5000"]
+
+# Install Flask
+RUN pip install flask gunicorn
+
+# Expose default port
+EXPOSE 7860
+
+# Run with Gunicorn
+CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:7860", "app:app"]