title: docker-compose up with multiple yml confs does not start off
body: <p>This is the tree structure of my project:</p>
  
  <pre><code>.
  ├── backend-codebase
  │   ├── app.js
  │   ├── bin
  │   │   └── www
  │   ├── config.js
  │   ├── db
  │   │   ├── index.js
  │   │   ├── repos
  │   │   │   └── todos.js
  │   │   └── sql
  │   │       ├── index.js
  │   │       └── todos
  │   ├── dev
  │   │   └── postgres
  │   ├── index.js
  │   ├── package.json
  │   ├── public
  │   │   ├── images
  │   │   ├── javascripts
  │   │   └── stylesheets
  │   │       └── style.css
  │   ├── routes
  │   │   ├── api.js
  │   │   ├── index.js
  │   │   └── users.js
  │   ├── scripts
  │   │   ├── applyFixtures.js
  │   │   ├── dev_entrypoint.sh
  │   │   ├── fixtures.json
  │   │   └── psql_dump.sql
  │   ├── views
  │   │   ├── api.ejs
  │   │   ├── db.ejs
  │   └── yarn.lock
  ├── dev
  │   ├── Dockerfile-node
  │   ├── Dockerfile-postgres
  │   ├── development.sh
  │   ├── docker-compose-common.yml
  │   ├── docker-compose-dev.yml
  │   └── postgres
  │       ├── 12-12-2016_16_58_59.dump
  ...
  </code></pre>
  
  <p>I use <code>docker-compose</code> in order to create three containers and orcherstrate everything:
  - a node server
  - a postgres DB 
  - a data container for the DB</p>
  
  <p>plus, I created two (and a third one is missing) yaml files under <code>/dev/docker-compose-*.yml</code>. <code>docker-compose-dev</code> extends the common one and should build the images as well as run all the images.</p>
  
  <p>In order to start off everything I tried to launch the following:</p>
  
  <pre><code>$ docker-compose up --file dev/docker-compose-common.yml --file dev/docker-compose-dev.yml
  </code></pre>
  
  <p>But what I get is this output:</p>
  
  <pre><code>Builds, (re)creates, starts, and attaches to containers for a service.
  
  Unless they are already running, this command also starts any linked services.
  
  The `docker-compose up` command aggregates the output of each container. When
  the command exits, all cont
  </code></pre>
  
  <p>I really don't understand what I'm doing wrong</p>