Free some space and trigger CI

pica-dokuwiki/Dockerfile

@@ -26,7 +26,9 @@ RUN apt-get update -y && \
     rm -f dokuwiki-stable.tgz && \
     chown -R www-data . && \
     chmod +x /run.sh && \
-    sed -i "s/\${MAXSIZE}/100M/g" /etc/nginx/nginx.conf
+    sed -i "s/\${MAXSIZE}/100M/g" /etc/nginx/nginx.conf && \
+    apt-get remove wget tar && \
+    apt-get clean
 
 EXPOSE 80
 VOLUME ["/var/www/html"]