Create networks automatically in Docker Compose : <p>When using custom networks in Docker like</p>

<pre><code>networks:
  default:
    external:
      name: service-tier
</code></pre>

<p>And try to run that, I´m getting the error</p>

<blockquote>
  <p>ERROR: Network service-tier declared as external, but could not be
  found. Please create the network manually using <code>docker network create
  service-tier</code> and try again.</p>
</blockquote>

<p>Is it possible to create networks automatically with docker-compose or is there no other way than creating them manually first?</p>
