Update Dockerfile

Dockerfile

@@ -30,7 +30,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY ./backend .
 
 # Tell the container to expose port 8080 for web traffic
-EXPOSE 8080
+EXPOSE 8081
 
 # The command to run when the container starts
-CMD ["gunicorn", "--bind", "0.0.0.0:8080", "app:app"]
+CMD ["gunicorn", "--bind", "0.0.0.0:8081", "app:app"]