Unable to uninstall app followed by reboot unable to start

[canadaduane]

I've been experimentally trying to create a Windmill for Cloudron container. However, I'm now stuck without the ability to uninstall it, and it has now taken down my whole server

Here is how (I think) I got here:

1. Windmill requires docker service, because it has an lsp container and worker containers that need to spin up during execution.
2. I was trying to diagnose a failure to start, so I entered a cloudron console for windmill and ran the start.sh script that is normally reserved for booting up the Docker container.
3. At this point, the console itself got stuck in a crash loop--it tried connecting, would fail, then would restart, restart, restart...
4. I tried to uninstall the container itself, but that resulted in the error 500 above (with tantalizing "message:" and no message).
5. I then rebooted the server itself, but it won't come up again.

How do I get back to running state? What logs should I look for to find out why I can't boot?

[canadaduane]

Update: never mind. I ran out of disk space. Fixed by deleting the docker registry app that had been holding on to all of the docker data during experimentation.