You may want to override some of the default settings used by Black Duck. Instead of directly editing the .yml file, use the docker-compose.local-overrides.yml, located in the docker-swarm directory.
By using this file to modify default settings, your changes are preserved when you upgrade: you no longer need to modify the .yml file after each Black Duck upgrade. T
Note in the docker-compose command, the docker-compose.local-overrides.yml file must be the last .yml file used. For example, the following command starts Black Duck using an external database:
docker stack deploy -c docker-compose.externaldb.yml -c docker-compose.local-overrides.yml hub