Portainer Install Ubuntu tutorial

[HippyCraig]

Under section 1.1 I was getting some depercation warning. Im new to linux but I did find that the apt-key now uses keyrings as the latest version of Ubuntu 22.04 is the last version to support the older key types I found this https://docs.docker.com/engine/install/ubuntu/

I already had the folder so the first line I didnt need

Is this the right thing to do?