Add crawl command to nextcloud crontab

nextcloud/image/Dockerfile

@@ -10,5 +10,6 @@ COPY supervisord.conf /
 ENV NEXTCLOUD_UPDATE=1
 
 RUN echo '*/15 * * * * php /var/www/html/occ preview:generate-all' >> /var/spool/cron/crontabs/www-data
+RUN echo '0 2 * * 0 php /var/www/html/occ recognize:recrawl' >> /var/spool/cron/crontabs/www-data
 
 CMD ["/usr/bin/supervisord", "-c", "/supervisord.conf"]]