switch webserver to gunicorn

setup.sh

@@ -108,6 +108,7 @@ matrix-client
 reportlab
 requests
 pillow
+gunicorn
 EOL
 
 # 3. .env-Datei im übergeordneten Verzeichnis erstellen
@@ -878,9 +879,7 @@ RUN groupadd -g \$GID appuser && \
     chown -R appuser:appuser /app
 
 USER appuser
-
-EXPOSE 5000
-CMD ["python", "app.py"]
+CMD ["gunicorn", "-b", "0.0.0.0:5000", "app:app"]
 DOCKER_END
 
 # 6. docker-compose.yml