This is a docker image that runs the OpenAM config tool to configure a freshly installed instance.
The image expects that a volume /config/openam/ will be mounted and contains property files that will be applied. The property files will be applied in lexical order (01_file1.properties, etc.).
If /config/openam does not exist, a default configuration will be used. It is probably not what you want.
In a Kubernetes environment /config/openam should come from a gitRepo volume or a git sidecar container that clones the configuration.