text: const startInvoker = require('./lib/invoker');
  
  const userFunctionUri = process.env.FUNCTION_URI;
  if (typeof userFunctionUri === 'undefined' || userFunctionUri.trim() === '') {
      throw 'FUNCTION_URI envvar not set or empty. Aborting.'
  }
  const port = process.env.PORT || '8081';
  
  startInvoker(userFunctionUri, port);
  