Add docker files.

docker/docker-compose.yml

@@ -0,0 +1,11 @@
+version: '2'
+
+services:
+
+    php:
+        build:
+            context: ./php
+            dockerfile: Dockerfile-72
+        volumes:
+            - ./app:/app
+        tty: true

docker/php/Dockerfile-71

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+FROM php:7.1.14-alpine
+
+MAINTAINER Peter Lai <alk03073135@gmail.com>
+
+ADD composer-setup.php composer-setup.php
+
+RUN apk update && \
+    apk add git
+
+# Install nodejs
+# Run apk add --update nodejs nodejs-npm
+
+# Install composer
+RUN php composer-setup.php && \
+    php composer-setup.php --install-dir=/usr/bin --filename=composer
+
+WORKDIR /app

docker/php/Dockerfile-72

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+FROM php:7.2.2-alpine
+
+MAINTAINER Peter Lai <alk03073135@gmail.com>
+
+ADD composer-setup.php composer-setup.php
+
+RUN apk update && \
+    apk add git
+
+# Install nodejs
+# Run apk add --update nodejs nodejs-npm
+
+# Install composer
+RUN php composer-setup.php && \
+    php composer-setup.php --install-dir=/usr/bin --filename=composer
+
+WORKDIR /app

docker/php/composer-setup.php

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+<?php
+
+copy('https://getcomposer.org/installer', 'composer-setup.php');
+
+if (hash_file('SHA384', 'composer-setup.php') === '544e09ee996cdf60ece3804abc52599c22b1f40f4323403c44d44fdfdd586475ca9813a858088ffbc1f233e9b180f061') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;