/var/pubkeys should exist

Dockerfile

@@ -35,12 +35,14 @@ RUN rm -rf /etc/cron.*/* \
  && echo "*/15 * * * *  root  /bin/chown root:root /etc/cron.d/* && /bin/chmod u=rw,go= /etc/cron.d/*" >> /etc/crontab \
  && echo "*/15 * * * *  root  sed -i -r -e '$ s/^(.+)$/\\\1\\\n/' /etc/cron.d/*" >> /etc/crontab
 
+RUN mkdir /var/pubkeys
+ 
 # yeah, we kind of need that
 ADD run.sh /run.sh
 RUN chmod +x /run.sh
 
 # cron volumes
-VOLUME ["/etc/cron.d", "/etc/cron.daily", "/etc/cron.hourly", "/etc/cron.monthly", "/etc/cron.weekly"]
+VOLUME ["/etc/cron.d", "/etc/cron.daily", "/etc/cron.hourly", "/etc/cron.monthly", "/etc/cron.weekly", "/var/pubkeys"]
 
 # well
 WORKDIR /etc