Defining a domain

A domain is defined by a release configuration. In order to define a domain, you need to create a new release config yaml file in your repository

A simple release config can be defined as shown below

// Sample release config <business_domain.yaml>
releaseName: <business_domain>   # --> The name of the domain
pool: <sandbox/scratch org pools>
excludeAllPackageDependencies: true
includeOnlyArtifacts:   # --> Insert packages
  - <pkg1>
releasedefinitionProperties:
  promotePackagesBeforeDeploymentToOrg: prod

The resulting file could be stored in your repository and utilized by the commands such as build, release etc.