Added "project-name" param so containers have better names

[woutersamaey]

Containers won't have the generated_ prefix anymore, but btcpayserver_ instead. The generated_ prefix comes from the dir name Generated where the docker-compose.yml is at and this is default behaviour.

WARNING: This can be tricky and maybe even dangerous if best practices were not followed. Let's discuss.

This change helps to find containers that are part of the BTCPay Server on a server that's running other apps as well.

All I did was add -p btcpayserver to all docker-compose commands.

[Kukks]

I think this would be a breaking change for some scripts.

[NicolasDorier]

Yes, while I agree this should have been done from day 1, I am against changing it now as it will breaks quite a lot of things. (documentations and scripts)