Suggestion: Add portainer BE (and other misc docker suggestions)

[TheRealGramdalf]

With the (somewhat recent) Portainer take 5 program, BE is available to pretty much all homelab users. It would be nice to have an option to install Portainer BE as opposed to CE when using the docker or alpine-docker scripts.

Another welcome change would be to use docker-compose for Portainer (or at least the option to). That way your Portainer CT would be more declarative, easily editable, and in general simpler to update.
A few misc ideas related to that:

• compose.yml in the home directory, so it's easy to find?
• Update instructions and password reset info (for portainer) embedded in the compose.yml file, or
• Update instructions, password reset info and such (or the location of a file/link to an article specific to the tteck scripts) in the MOTD
• Could use https://github.com/portainer/portainer-compose or https://www.composerize.com/ as resources to get compose started easily

I have decent knowledge in bash/sh scripting, and would be happy to help - if I weren't quite so busy with other things. I might be able to whip up a mock setup or some modifications to the script, but finalization would be up to you (tteck).