I just went to the Portainer websites and I can't figure out what it does, exactly. All I know is they've chosen nice fonts. Do you mind explaining what it does for you?

It adds a GUI to Docker so that you can manage your containers from a web page instead of the cli (create, configure, start/stop, etc.) You don't need it if you know Docker well but it's a nice to have.

Thanks. Sounds a bit like Docker Desktop.