Configuration is based on a yaml file. By default it’s called config.yaml or configuration.yaml. Yaml supports file nesting, so it’s more readable. When you see:
key: !include file.yaml
it means that key section will be read from file.yaml.
boneIO app supports several sections.
key: !include_files file.yaml file2.yaml file3.yaml
it means that key section will be read from 3 files file.yaml. file2.yaml, file3.yaml.
key: !include_dir_list directory
it means that key section will be read from all files in directory.