Ensure that the directory `/run/lighttpd` exists, and that it is owned by www-data. How did this work before?!

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

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

@@ -118,6 +118,11 @@ ensure_basic_configuration() {
         cp /etc/.pihole/advanced/01-pihole.conf /etc/dnsmasq.d/
     fi;
 
+    # Ensure that /run/lighttpd exists for the php socket, and is owned by www-data.
+    # Without this, the web interface will return a 503. Not sure how this used to work, as this was always the directory that was used in previous versions of the image.
+    mkdir -p /run/lighttpd
+    chown www-data:www-data /run/lighttpd
+
     # setup_or_skip_gravity
 }