Validate if tink-worker configuration works about hook HOT 1 CLOSED

I validated that the tink-worker picks up configuration from a YAML file. Obviously, it does not work as smoothly and nicely as I would like to but we can make it somewhere I suppose. I say that because it does not pick up from a file the TLS cert for the tink-client, those have to be passed via environment variable to the container. We have to figure out how I suppose.

I tried it on Osie and it works. First the configuration file looks like this:

id: "hardware-uuid-from-proc-cmdline"
docker-registry: "ip-from-proc-cmdline"
registry-username: "same-as-before-admin"
registry-password: "same-as-before"

This is the docker command I used to start the tink-worker docker container:

docker run --privileged -t --name "tink-worker" \
	-e "TINKERBELL_GRPC_AUTHORITY=$grpc_authority" \
	-e "TINKERBELL_CERT_URL=$grpc_cert_url" \
	-v /worker:/worker \
	-v /var/run/docker.sock:/var/run/docker.sock \
        # this is the location of the generated configuration file
        -v /etc/tinkerbell/tink-worker.yaml:/etc/tinkerbell/tink-worker.yaml /
	-t \
	--net host \
	"$docker_registry/tink-worker:latest"

from hook.