Installation on docker using docker-compose?

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I'm running a VPS Using Ubuntu server, and docker, and I use docker-compose to manage all my containers. It seems reasonable to attempt to install Sage, or CoCalc, on my system. But I can't find any docker-compose sample configurations for Sage, and my own docker knowledge is too rudimentary to create one from scratch.

Is there such a thing available - a docker compose configuration for Sage/CoCalc? I haven't found one in my searching, but that's not to say that such a thing doesn't exist.

Many thanks, Alasdair