add updates to prepare script

build/scripts/prepare.sh

@@ -37,11 +37,13 @@ ln -sf /bin/true /usr/bin/ischroot
 ln -sf /bin/true /usr/bin/chfn
 
 ## Install HTTPS support for APT
+apt update
 apt_install_permanent apt-transport-https
 
 ## Upgrade all packages
+apt update
 apt dist-upgrade -y --no-install-recommends
 
 ## Set timezone
 echo $TIMEZONE > /etc/timezone
-dpkg-reconfigure -f noninteractive tzdata
+dpkg-reconfigure -f noninteractive tzdata