message: Add ability to define GA key with env variable
diff: @@ -84,6 +84,7 @@ module.exports = env => {
  POSTGRES_HOST,
  POSTGRES_PORT,
  LOG_NAME,
  + GA_KEY,
  LOG_DESTINATION,
  } = process.env;
  @@ -104,5 +105,7 @@ module.exports = env => {
  if (LOG_NAME !== undefined) cfg.log.name = LOG_NAME;
  if (LOG_DESTINATION !== undefined) cfg.log.file = LOG_DESTINATION;
  + if (GA_KEY !== undefined) cfg.googleAnalyticsKey = GA_KEY;
  +
  return cfg;
  };
  