Raise memory limit for cron too

Dockerfile

@@ -39,7 +39,10 @@ RUN apt-get update \
 ## Raise memory limit for PHP
 ##
 ENV PHP_MEMORY_LIMIT=1024M
-RUN echo "memory_limit=1024M" > /usr/local/etc/php/conf.d/memory-limit.ini
+RUN echo 'memory_limit=1024M' \
+    > /usr/local/etc/php/conf.d/memory-limit.ini \
+ && echo '*/5 * * * * php -d memory_limit=1024M -f /var/www/html/cron.php' \
+    > /var/spool/cron/crontabs/www-data
 
 ##
 ## CRON SETUP
@@ -50,9 +53,9 @@ RUN apt-get update && apt-get install -y \
     supervisor \
   && rm -rf /var/lib/apt/lists/* \
   && mkdir /var/log/supervisord /var/run/supervisord
-
 COPY supervisord.conf /etc/supervisord.conf
 
+
 ##
 ## GMP Support (for bookmark extension)
 ##