byobu launch on reboot

 byobu new-session -d -s "onreboot"

byobu new-window -t "onreboot" "sudo sh ./build.sh" >/home/ubuntu/logs/api_launch.log 2>&1

Better approach at:

https://bholameena.blogspot.com/2022/10/starting-multiple-byobu-process-through.html

Ubuntu - choosing among JAVA versions

 sudo update-alternatives --config java

JDK 8

apt install openjdk-8-jdk

remove unused css in html

 This is very useful code to remove unused css in HTML

https://uncss-online.com/