Use Alpine PHP-FPM

data/Dockerfiles/php-fpm/Dockerfile

@@ -1,8 +1,6 @@
 FROM php:7.1-fpm-alpine
 LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
-ARG DEBIAN_FRONTEND=noninteractive
-
 RUN apk add -U --no-cache libxml2-dev icu-dev icu-libs redis mysql-client bash autoconf g++ make openssl
 RUN pecl install redis && pecl clear-cache
 RUN docker-php-ext-configure intl