added development environment

PHP.Dockerfile

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+FROM php:fpm
+
+# install pdo mysql extension
+RUN docker-php-ext-install pdo pdo_mysql
+
+# install xdebug for php
+RUN pecl install xdebug && docker-php-ext-enable xdebug

app/public/index.php

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+<?php
+$pdo = new PDO('mysql:dbname=tutorial;host=mysql', 'grisu', 'secret', [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
+
+$query = $pdo->query('SHOW VARIABLES like "version"');
+
+$row = $query->fetch();
+
+echo 'MySQL version:' . $row['Value'];

docker-compose.yml

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+version: '3'
+services:
+  web:
+    image: nginx:latest
+    ports:
+      - "80:80"
+    volumes:
+      - ./nginx.conf:/etc/nginx/conf.d/nginx.conf
+      - ./app:/app
+  php:
+    build:
+      context: .
+      dockerfile: PHP.Dockerfile
+    volumes:
+      - ./app:/app
+  mysql:
+    image: mariadb:latest
+    environment:
+      MYSQL_ROOT_PASSWORD: 'secret'
+      MYSQL_USER: 'grisu'
+      MYSQL_PASSWORD: 'secret'
+      MYSQL_DATABASE: 'tutorial'
+    volumes:
+      - mysqldata:/var/lib/mysql
+    ports:
+      - 3306:3306
+volumes:
+  mysqldata: {}

nginx.conf

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+server {
+    listen 80 default_server;
+    root /app/public;
+
+    index index.php index.html index.htm;
+
+    location ~ \.php$ {
+        fastcgi_pass php:9000;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        include fastcgi_params;
+    }
+}