message: enable log levels
diff: import { config, initConfig, loadApiDefs } from '@graphql-portal/config';
  -import { logger } from '@graphql-portal/logger';
  +import { configureLogger, logger } from '@graphql-portal/logger';
  import cluster from 'cluster';
  import { cpus } from 'os';
  import { nodeId, startServer } from './server';
  @@ -15,6 +15,7 @@ function handleStopSignal(): void {
  async function start(): Promise<void> {
  // TODO: config should be read by master and communicated to forks via RPC
  await initConfig();
  + configureLogger(config.gateway);
  await loadApiDefs();
  if (!config.gateway) {
  throw new Error('Error loading the gateway.json|yaml configuration file.');
  