added drush to php image + gd + php-custom.ini, updated readme for reverse proxy with apache

php/Dockerfile

@@ -1,3 +1,23 @@
 FROM php:5.6-fpm
 
-RUN docker-php-ext-install pdo_mysql
+COPY ./php-custom.ini /usr/local/etc/php/conf.d/php-custom.ini
+
+RUN apt-get update && apt-get install -y \
+		libfreetype6-dev \
+		libjpeg62-turbo-dev \
+    libmcrypt-dev \
+		libpng-dev \
+    zip \
+	&& docker-php-ext-install -j$(nproc) iconv mcrypt \
+	&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
+	&& docker-php-ext-install -j$(nproc) gd
+
+RUN docker-php-ext-install pdo_mysql zip
+
+RUN apt-get install -y git vim
+
+RUN export COMPOSER_HOME=/usr/local/composer && \
+    curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer && \
+    composer global require drush/drush:6.5.0 && \
+    composer global install && \
+    ln -s /usr/local/composer/vendor/drush/drush/drush /usr/local/bin/drush