How I can group containers in docker-compose?
<p>I'm using this docker-compose.yml.
And I wanna make simpler and inherrit configuration, if its possible.</p>

<pre><code>version: '2'

services:
    nginx-proxy:
        image: jwilder/nginx-proxy
        container_name: nginx-proxy
        ports:
            - "80:80"
        volumes:
            - /var/run/docker.sock:/tmp/docker.sock:ro

    web_one:
        container_name: "web_one"
        build:
            context: ./
            dockerfile: web.docker
        volumes:
            - ./../one:/var/www

        environment:
            - VIRTUAL_HOST=whoami_one.local
        links:
            - app_one
    app_one:
        container_name: "app_one"
        build:
            context: ./
            dockerfile: app.docker
        volumes:
            - ./../one:/var/www
        links:
            - db


    web_two:
        container_name: "web_two"
        build:
            context: ./
            dockerfile: web.docker
        volumes:
            - ./../two:/var/www

        environment:
            - VIRTUAL_HOST=whoami_two.local
        links:
            - app_two
    app_two:
        container_name: "app_two"
        build:
            context: ./
            dockerfile: app.docker
        volumes:
            - ./../two:/var/www
        links:
            - db
</code></pre>

<p>I have 15 sites with same configuration.
Can I make config simpler? Like this:</p>

<pre><code>version: '2'

services:
    nginx-proxy:
        image: jwilder/nginx-proxy
        container_name: nginx-proxy
        ports:
            - "80:80"
        volumes:
            - /var/run/docker.sock:/tmp/docker.sock:ro

    one:
        extends:
            file: common-services.yml
        volumes:
            - ./../one:/var/www

        environment:
            - VIRTUAL_HOST=whoami_one.local

    two:
        extends:
            file: common-services.yml
        volumes:
            - ./../two:/var/www

        environment:
            - VIRTUAL_HOST=whoami_two.local
</code></pre>

<p>Or better?</p>

<p>Thank you!</p>