How to send all traffic from one container to the VPN container (Synology NAS)

  docker, openvpn, synology

I have two Docker containers, one is a VPN client currently connected, and the other is a Xteve container, I need help sending all traffic from that Xteve container as listed in the image below to through the VPN container, and if the VPN drops to block traffic on the Xteve container. This is Docker on Synology NAS.

Please help.

enter image description here

Source: Docker Questions