windmill CLI Docker image - usage

[francescor]

We've see #3943 and very happy to have it available

$  docker run --rm  ghcr.io/windmill-labs/windmill-cli --version
wmill 1.410.3

What do we need to mount to use it?

We would like to use it for wmill sync with our production windmill

In detail we need to init, but cannot

$ touch wmill.yaml
$ docker run --rm  -v ./wmill.yaml:/wmill.yaml ghcr.io/windmill-labs/windmill-cli init
wmill.yaml already exists