code: function setGlobalConfigDirectory (argv, filePath) {
    const customConfigPath =
        argv.c ||
        argv.config ||
        filePath ||
        process.env.DEEPSTREAM_CONFIG_DIRECTORY
    const configPath = customConfigPath
      ? verifyCustomConfigPath(customConfigPath)
      : getDefaultConfigPath()
    global.deepstreamConfDir = path.dirname(configPath)
    return configPath
  }
docs: Set the globalConfig prefix that will be used as the directory for ssl, permissions and auth
  relative files within the config file