Xibo Docker on Proxmox very slow

To be completed by the original poster:

CMS Version

Specify the full CMS version you are using, including the revision number.

Installation Method

Docker over Dockge

Operating System

Debian 12 on Proxmox 8.3.0

Issue

My webinterface is responding very slow.
The system itself does not show high CPU or RAM or IO usage.

I used Dockge to install the system.

docker stats:

Proxmox stats:

    services:
  cms-db:
    image: mysql:8.0
    volumes:
      - ./shared/db:/var/lib/mysql:Z
    environment:
      - MYSQL_DATABASE=cms
      - MYSQL_USER=cms
      - MYSQL_PASSWORD=password
      - MYSQL_ROOT_PASSWORD=password
    mem_limit: 2g
    env_file: config.env
    restart: always
  cms-xmr:
    image: ghcr.io/xibosignage/xibo-xmr:1.0
    ports:
      - 9505:9505
    restart: always
    mem_limit: 512m
    env_file: config.env
  cms-web:
    image: ghcr.io/xibosignage/xibo-cms:release-4.2.2
    volumes:
      - ./shared/cms/custom:/var/www/cms/custom:Z
      - ./shared/backup:/var/www/backup:Z
      - ./shared/cms/web/theme/custom:/var/www/cms/web/theme/custom:Z
      - ./shared/cms/library:/var/www/cms/library:Z
      - ./shared/cms/web/userscripts:/var/www/cms/web/userscripts:Z
      - ./shared/cms/ca-certs:/var/www/cms/ca-certs:Z
    restart: always
    environment:
      - MYSQL_HOST=cms-db
      - XMR_HOST=cms-xmr
      - CMS_USE_MEMCACHED=true
      - MEMCACHED_HOST=cms-memcached
    env_file: config.env
    ports:
      - 80:80
    mem_limit: 2g
  cms-memcached:
    image: memcached:alpine
    command: memcached -m 15
    restart: always
    mem_limit: 200M
  cms-quickchart:
    image: ianw/quickchart
    restart: always
networks: {}