title: Airflow up and running but airflow.cfg file not found
body: <p>I have set up the Airflow environment but can’t find the airflow.cfg file.Things that I have done so far:</p>
  <ul>
  <li>Have installed Ubuntu on Windows Wsl.
  Have installed Airflow on Ubuntu using the following composer file: <a href="https://airflow.apache.org/docs/apache-airflow/2.2.4/docker-compose.yaml" rel="nofollow noreferrer">https://airflow.apache.org/docs/apache-airflow/2.2.4/docker-compose.yaml</a></li>
  <li>Airflow is up and running.</li>
  <li>The task using EmailOperator doesn’t send email.</li>
  <li>Wanted to configure SMTP parameters in airflow.cfg but haven’t found such a file in <a href="https://i.stack.imgur.com/XTXP1.png" rel="nofollow noreferrer">local drive and Airflow container</a>.</li>
  </ul>
  <p>How is that that Airflow is up and running but airflow.cfg file is not found? It was the official Airflow composer file that I was using.</p>