Add Docker support

docker/php/start.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -xe
+
+# Detect the host IP
+export DOCKER_BRIDGE_IP=$(ip ro | grep default | cut -d' ' -f 3)
+
+if [ "APP_ENV" = 'prod' ]; then
+	composer install --prefer-dist --no-dev --no-progress --no-suggest --optimize-autoloader --classmap-authoritative
+else
+	composer install --prefer-dist --no-progress --no-suggest
+fi
+
+# Permissions hack because setfacl does not work on Mac and Windows
+chown -R www-data var
+
+exec php-fpm