code: func init() {
  	// Milo is only responsible for validating the config matching the instance's
  	// appID in a project config.
  	validation.Rules.Add("regex:projects/.*", "${appid}.cfg", validateProjectCfg)
  	validation.Rules.Add("services/${appid}", globalConfigFilename, validateServiceCfg)
  }
docs: // Config validation rules go here.