adding redis extention

Dockerfile

@@ -203,6 +203,8 @@ RUN echo @testing http://nl.alpinelinux.org/alpine/edge/testing >> /etc/apk/repo
     #docker-php-ext-install pdo_mysql pdo_sqlite mysqli mcrypt gd exif intl xsl json soap dom zip opcache && \
     docker-php-ext-install iconv pdo_mysql pdo_sqlite pgsql pdo_pgsql mysqli gd exif intl xsl json soap dom zip opcache && \
     pecl install xdebug-2.7.0RC1 && \
+    pecl install -o -f redis && \
+    echo "extension=redis.so" > /usr/local/etc/php/conf.d/redis.ini && \
     docker-php-source delete && \
     mkdir -p /etc/nginx && \
     mkdir -p /var/www/app && \