php-fpm dockerfile simplification

By using Alpine pkgs instead of the official php base image the image size has been reduced from 459 MB to 55.7 MB a reduction of a whooping 403.3 MB :D

data/Dockerfiles/php-fpm/Dockerfile

@@ -1,17 +1,52 @@
-FROM php:7.1-fpm-alpine
+FROM alpine:3.6
+
 LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
-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
-RUN docker-php-ext-install intl pdo pdo_mysql xmlrpc
-RUN docker-php-ext-enable redis
-RUN pear install channel://pear.php.net/Net_IDNA2-0.1.1 Auth_SASL Net_IMAP NET_SMTP Net_IDNA2 Mail_mime
-RUN apk del autoconf g++ make libxml2-dev icu-dev
+# Add script
+COPY docker-entrypoint.sh /
 
-COPY ./docker-entrypoint.sh /
+# Add group + user - 82 is the standard uid/gid for "www-data" in Alpine
+RUN set -x \
+&& addgroup -g 82 -S www-data \
+&& adduser -u 82 -D -S -G www-data www-data \
+\
+# Install Dependencies 
+&& apk add --update \
+&& apk add --no-cache bash php7-fpm php7-intl php7-pdo php7-pdo_mysql php7-xmlrpc php7-redis php7-pear \
+php7-pear-auth_sasl php7-pear-net_smtp php7-pear-net_idna2 php7-pear-mail_mime \
+&& pear install Net_IMAP \
+# MISSING apk for php7-pear-net_imap - can be installed once https://github.com/alpinelinux/aports/pull/1359 is merged.
+\
+# Configuring php-fpm
+&& set -ex \
+&& cd /etc/php7/ \
+# Change the setting so the daemon runs in the foreground and as www-data:www-data
+#&& sed -i 's/^;daemonize .*$/daemonize = no/g' /etc/php7/php-fpm.conf \
+&& sed -i 's/^user = .*/user = www-data/' /etc/php7/php-fpm.d/www.conf \
+&& sed -i 's/^group = .*/group = www-data/' /etc/php7/php-fpm.d/www.conf \
+&& { \
+    echo '[global]'; \
+    echo 'error_log = /proc/self/fd/2'; \
+    echo; \
+    echo '[www]'; \
+    echo '; if we send this to /proc/self/fd/1, it never appears'; \
+    echo 'access.log = /proc/self/fd/2'; \
+    echo; \
+    echo 'clear_env = no'; \
+    echo; \
+    echo '; Ensure worker stdout and stderr are sent to the main error log.'; \
+    echo 'catch_workers_output = yes'; \
+} | tee php-fpm.d/docker.conf \
+&& { \
+    echo '[global]'; \
+    echo 'daemonize = no'; \
+    echo; \
+    echo '[www]'; \
+    echo 'listen = [::]:9000'; \
+} | tee php-fpm.d/zz-docker.conf
 
 EXPOSE 9000
 
+# Time to milk the cows ;)
 ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD ["php-fpm"]
+CMD ["php-fpm7"]