docker-compose for nginx with php5-fpm using small alpine images

docker-compose.yml

version: '2'
services:
  php:
    image: php:5.6-fpm-alpine
    volumes:
     - data:/_data
     - ./site:/var/www/html:ro
    networks:
      - backend
    command: sh -c 'chown www-data /_data && exec php-fpm'
  nginx:
    image: nginx:stable-alpine
    volumes:
     - ./site:/var/www/html:ro
     - ./nginx.conf:/etc/nginx/nginx.conf:ro
    ports:
      - "8000:80"
    networks:
      - backend

networks:
  backend:

volumes:
  data:
    driver: local

nginx.conf

user nginx;
worker_processes  1;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /dev/stdout  main;

    #sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip  on;

    server {
        listen       80;
        server_name  example.com;

        location / {
            root   /var/www/html;
            index  index.php;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /var/www/html;
        }

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        location ~ \.php$ {
            root           html;
            fastcgi_pass   php:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  /var/www/html/$fastcgi_script_name;
            include        fastcgi_params;
        }

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        location ~ /\.ht {
            deny  all;
        }
    }
}