title: docker-compose start "ERROR: No containers to start"
body: <p>I am trying to use Docker Compose (with Docker Machine on Windows) to launch a group of Docker containers. </p>
  
  <p>My docker-compose.yml:</p>
  
  <pre><code>version: '2'
  services:
    postgres:
      build: ./postgres
      environment:
        - POSTGRES_PASSWORD=mysecretpassword
    frontend:
      build: ./frontend
      ports:
        - "4567:4567"
      depends_on:
        - postgres
    backend:
      build: ./backend
      ports:
         - "5000:5000"
      depends_on:
         - postgres
  </code></pre>
  
  <p><code>docker-compose build</code> runs successfully. When I run <code>docker-compose start</code> I get the following output:</p>
  
  <pre><code>Starting postgres ... done
  Starting frontend ... done
  Starting backend ... done
  ERROR: No containers to start
  </code></pre>
  
  <p>I did confirm that the docker containers are not running. How do I get my containers to start?</p>