Docker production ready php-fpm and nginx configuration

At this time I use smth like:

Dockerfile:

FROM php:fpm
COPY . /var/www/app/
WORKDIR /var/www/app/
RUN composer install
EXPOSE 9000
VOLUME /var/www/app/web

Dockerfile.nginx

FROM nginx
COPY default /etc/nginx/default

docker-compose.yml

app:
  build:
    context: .
web:
  build:
    context: .
    dockerfile: Dockerfile.nginx
  volumes_from: app  

But in few days on 17.05 release we can do in one Dockerfile smth like:

FROM php:cli AS builder
COPY . /var/www/app/
WORKDIR /var/www/app/
RUN composer install && bin/console assets:dump

FROM php:fpm AS app
COPY --from=builder /var/www/app/src /var/www/app/vendor /var/www/app/
COPY --from=builder /var/www/app/web/app.php /var/www/app/vendo /var/www/app/web/

FROM nginx AS web
COPY default /etc/nginx/default
COPY --from=builder /var/www/app/web /var/www/app/web

I solve the problem by making a shared volume with the docker-compose file:

version: '3'

volumes:
 share_place:

services:
 php:
  image: php:5-fpm-alpine
  ports:
   - 9000:9000
  volumes:
   - share_place:/var/www/app
 nginx:
  image: nginx:alpine
  ports:
   - 3000:80
  volumes:
   - share_place:/var/www/app

This will create a volume share_place that will share the data between the two container.