~/h.gimslab.com $ cat docker-compose.yml 
version: '2'
services:
  nginx:
    image: nginx:latest
    ports:
      - "80:80"
    volumes:
      - ./nginx/code:/code
      - ./nginx/site.conf:/etc/nginx/conf.d/site.conf
    depends_on:
      - php
    
  php:
    image: php:7-fpm
    volumes:
      - ./nginx/code:/code

~/h.gimslab.com $ ll nginx/ -R
nginx/:
total 8
drwxr-xr-x 2 xxx xxx 4096 Jul 23 00:37 code
-rw-r--r-- 1 xxx xxx  488 Jul 23 00:38 site.conf

nginx/code:
total 12
-rw-r--r-- 1 xxx xxx 13 Jul 23 00:35 index.html
-rw-r--r-- 1 xxx xxx 22 Jul 23 00:06 index.php
-rw-r--r-- 1 xxx xxx  4 Jul 23 00:37 z.html

~/h.gimslab.com $ cat nginx/site.conf 
server {
    index index.html;
    server_name gimspi;
    root /code;

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass php:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}