Slightly adjacent, but I found the excitement of actually getting the ‘Congratulations, you installed discourse! 
’ screen made me forget about the rest of the guide. 
I did remember the Post-Install Maintenance eventually, but perhaps there’s space for a ‘Prepare your Cloud Server (optional)’ section inbetween “Access Your Cloud Server” and “Install Discourse”? That could include the dpkg-reconfigure -plow unattended-upgrades, apt install libpam-cracklib, and fail2ban info, and maybe the apt-get update/upgrade?