Environment to use instead of monolithic

Hello:

I have been 6 days trying to install CommCare Cloud and HQ on single machine, but I came to the conclusion that the monolith environment from dimagi/sample-environment is outdated. The problem is that using any version of python results in a compatibility error
(probably by mixing python 2 and python 3)

My question is: Which environment should I use in order to have a monolithic installation of CommcareCLoud and HQ?

It looks like that repository hasn't been updated in a month or so. I don't believe there's an example environment that's guaranteed to work out of the box. You can look over the descriptions of those files and the live environments for reference. In particular, swiss and pna are both monolithic environments, and may make good examples for putting together your own configuration.