Merge pull request #1350 from sebastianliebscher/image-size

shrink image size by ~10%

src/s6/debian-root/usr/local/bin/install.sh

@@ -97,6 +97,8 @@ mv /etc/pihole/macvendor.db /macvendor.db
 rm /etc/lighttpd/conf-enabled/99-unconfigured.conf
 ## Remove the default lighttpd placeholder page for good measure
 rm /var/www/html/index.lighttpd.html
+## Remove redundant directories created by the installer to reduce docker image size
+rm -rf /tmp/*
 
 if [ ! -f /.piholeFirstBoot ]; then
   touch /.piholeFirstBoot