run examples with fpm in docker

Dockerfile

@@ -1,24 +1,3 @@
-FROM php:5.6-cli
-
-RUN apt-get update && apt-get install -y \
-     curl \
-     git \
-     subversion \
-     unzip \
-     wget
+FROM php:5.6-fpm
 
 RUN pecl install redis-2.2.8 && docker-php-ext-enable redis
-
-# Allow Composer to be run as root
-ENV COMPOSER_ALLOW_SUPERUSER 1
-
-RUN curl -f -sS https://getcomposer.org/installer | php -- --install-dir=bin --filename=composer
-
-COPY composer.json composer.json
-RUN COMPOSER_VENDOR_DIR=/root/composer/vendor/ composer install
-
-VOLUME /prometheus_client_php
-
-WORKDIR /prometheus_client_php
-
-CMD [ "php", "./example.php" ]