Add sha256 check, shell debug log and PHP production config

fpm-alpine/Dockerfile

@@ -1,38 +1,45 @@
 FROM php:7.2-fpm-alpine
 LABEL maintainer="markus@martialblog.de"
 ARG version='3.15.8+190130'
+ARG sha256_checksum='0eb46c81c8fce8eb40625a899ed3a32a2f63a4dd9158da7ee2df2d78a67d4c0b'
 
 # Install OS dependencies
-RUN apk add --no-cache --virtual .build-deps \
-    libpng-dev \
-    openldap-dev \
-    imap-dev \
-    postgresql-dev && \
-    apk add --no-cache netcat-openbsd bash
+RUN set -ex; \
+        apk add --no-cache --virtual .build-deps \
+        libpng-dev \
+        openldap-dev \
+        imap-dev \
+        postgresql-dev && \
+        apk add --no-cache netcat-openbsd bash
 
 # Install PHP Plugins
-RUN docker-php-ext-configure imap --with-imap-ssl && \
-    docker-php-ext-install \
-    gd \
-    imap \
-    ldap \
-    mbstring \
-    pdo \
-    pdo_mysql \
-    pdo_pgsql \
-    pgsql \
-    zip
+RUN set -ex; \
+        docker-php-ext-configure imap --with-imap-ssl && \
+        docker-php-ext-install \
+        gd \
+        imap \
+        ldap \
+        mbstring \
+        pdo \
+        pdo_mysql \
+        pdo_pgsql \
+        pgsql \
+        zip
 
 # Download, unzip and chmod of LimeSurvey
 ADD "https://github.com/LimeSurvey/LimeSurvey/archive/${version}.tar.gz" /tmp
 
-RUN tar xzvf "/tmp/${version}.tar.gz" --strip-components=1 -C /var/www/html/ && \
-    rm -rf "/tmp/${version}.tar.gz" \
-    /var/www/html/docs \
-    /var/www/html/tests \
-    /var/www/html/*.md && \
-    chown -R www-data:root /var/www/ ; \
-    chmod -R g=u /var/www
+RUN set -ex; \
+        echo "${sha256_checksum} /tmp/${version}.tar.gz" | sha256sum -c - && \
+        \
+        tar xzvf "/tmp/${version}.tar.gz" --strip-components=1 -C /var/www/html/ && \
+        \
+        rm -rf "/tmp/${version}.tar.gz" \
+        /var/www/html/docs \
+        /var/www/html/tests \
+        /var/www/html/*.md && \
+        chown -R www-data:root /var/www/ ; \
+        chmod -R g=u /var/www
 
 EXPOSE 9000