Folder	Purpose
standalone	Sets up an OpenSimulator instance in standalone mode, using MySQL (mariadb 10.5) as the storage engine.
standalone-wordpress	Same as Standalone, but has a WordPress instance prepped to control the userbase.

Using Docker Compose / Cheat Sheet

Start up an experiment: docker-compose up --build -d
- --build will build the Docker file needed for OpenSimulator.
- -d is optional - it brings you back to a prompt. If omitted, your terminal is locked to output (can return by typing docker-compose logs).
Stop experiment: docker-compose stop
Destroying: docker-compose down -v
- -v will remove the associated volumes (e.g. database storage data). If you keep it, the files will still hang around for the next up.

Troubleshooting

OpenSimulator does not start

MySQL and MariaDB may take longer to initiate than OpenSimulator is able to wait, causing OpenSim to crash. In these instances, just wait 2-3 mins for the MySQL installation to finish initialising, then run compose up again. This time it should stay running as the database instance is readied.

I'm not able to run commands in the OpenSimulator prompt

(In most instances, wait-for-it has been added to the builds to stop this situation from happening).

You are able to attach a shell to the current entrypoint, but so far this doesn't seem to work for me. You can 'cheese' this process by adding screen, allowing you to 'resume' the actively running session. To do this, replace the entrypoint in the Dockerfile to this:

ENTRYPOINT [ "screen", "-S", "OpenSim", "-D", "-m", "mono",  "./OpenSim.exe" ]

You can now access the OpenSimulator admin prompt by running docker-compose exec metaverse /bin/bash and then running screen -r OpenSim.