Problem:
A Docker app uses a network range which is already used in the local network (LAN). Therefore your app can not be reached through network.
Solution
Switch the docker network to a different network. There might be two docker networks. You can move both or only the disturbing one, but they must be different:
ucr set appcenter/docker/compose/network="172.31.0.1/16"
ucr set docker/daemon/default/opts/bip="172.33.0.1/16"
If you change the docker/daemon/default/opts/bip you need to restart the docker daemon:
systemctl restart docker.service
Note: You should not use assigned networks. Use a network from within the available ranges for private networks as written in RFC1928