splitted php5.6 dockerfile command

Docker/php-5.6-fpm/Dockerfile

@@ -8,21 +8,24 @@ RUN apt-get update && apt-get install -y \
     libmcrypt-dev \
 		libpng-dev \
 		mysql-client \
-    zip && \
-		docker-php-ext-install -j$(nproc) iconv mcrypt && \
+    zip
+
+RUN	docker-php-ext-install -j$(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 && \
 		docker-php-ext-install pdo_mysql zip && \
-		docker-php-ext-install opcache && \
-		apt-get install -y git vim && \
+		docker-php-ext-install opcache
+		
+RUN	apt-get install -y git vim && \
 		pecl install redis-3.1.0 && \
     pecl install xdebug-2.5.0 && \
     docker-php-ext-enable redis xdebug && \
-		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
+RUN	export COMPOSER_HOME=/usr/local/composer && \  
+		curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+
+RUN composer global require drush/drush:6.5.0 && \
+		composer global install && \
+		ln -s /usr/local/composer/vendor/drush/drush/drush /usr/local/bin/drush
 
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