[e12e]

It's probably a bad idea to willy-nilly "docker run" something too - but in this case it's extra silly - the demo requires docker and docker-compose - so the downloading/instruction might as well have been just:

   wget https://raw.githubusercontent.com/knadh/listmonk/master/docker-compose.yml
    docker-compose up demo-db demo-app

And a note that demo app runs on port 9000. Even better would be a demo docker-compose.yml, so that "docker-compose up" was enough.

Now, should you run some random docker image(s)? Maybe not. But it's easier to see what's going on - maybe you spin up a vm and run docker there, isolated?