Support certPath, tlsVerify, and apiVersion when using Docker Remote API

[coollog]

Have the docker task support inputs certPath and tlsVerify. These are useful for using, for example, minikube's Docker daemon as the remote, which would normally have these environment variables set:

DOCKER_TLS_VERIFY=1
DOCKER_HOST=tcp://192.168.39.124:2376
DOCKER_CERT_PATH=/home/me/.minikube/certs
DOCKER_API_VERSION=1.23

docker {
    useApi true
    tlsVerify '1' // <<<<<<<
    hostUrl 'tcp://192.168.39.124:2376'
    certPath '/home/me/.minikube/certs' // <<<<<<<
    apiVersion '1.23' // <<<<<<<
    apiUsername 'user'
    apiPassword 'password'
    apiEmail 'me@mycompany.com'
}

[bjornmagnusson]

Thanks for reporting this. This has been an long time issue, and should definitely be fixed