Ejemplo de Docker con PHP y Nginx

default.conf

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    index index.php index.html;
    server_name localhost;
    error_log  /var/log/nginx/error.log;
    access_log /var/log/nginx/access.log;
    root /home/sample.com/apps/code/public;

    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;
    }
}

docker-compose.yml

version: "3"
services:
  web:
    build:
      context: ./php
      dockerfile: sample.DockerFile
    ports:
      - "80:80"
    networks:
      - code-network
    links:
      - php

  php:
    image: php:7-fpm
    volumes:
        - ./php/code:/home/sample.com/apps/code
    networks:
      - code-network

networks:
    code-network:
        driver: bridge

index.php

<?php

echo "Hola amiguito estamos corriendo gracias a Docker";

sample.DockerFile

FROM nginx:alpine

COPY ./code /home/sample.com/apps/code

COPY ./conf/default.conf /etc/nginx/conf.d/default.conf

EXPOSE 80