Compose now checks the lables so Ansible provisions the network and then
the network is marked as external.

So I can see which host I'm deploying to right now.

Using the forward script. It turns out to be much more reliable (and
faster).

Only externally (the runner still uses the same environment variable). I
now have it in the .bashrc.private file so it needs to be more specific.

Using Docker Compose over SSH causes errors, but it's handled. The
tracebacks just make it harder to follow what's happening.