Configure this field as per your runtime environment.
If Docker URL/Nerdctl binary path is not configured or set empty for Job Specific Configuration, plugin will use Docker URL/Nerdctl binary path from Global Configuration if it is configured there.
If you are using dockerd then, expected configuration is docker socket path eg. unix:///path_of_docker.sock or tcp://[host]:[port], in case of TLS, cert path should be provided in field 'Cert file path'.
If you are using containerd then, expected configuration is nerdctl binary path.