src/server/worker/client.go
func NewClient(address string) (Client, error) {
	port, err := strconv.Atoi(os.Getenv(client.PPSWorkerPortEnv))
	if err != nil {
		return Client{}, err
	}
	conn, err := grpc.Dial(fmt.Sprintf("%s:%d", address, port),
		append(client.DefaultDialOptions(), grpc.WithInsecure())...)
	if err != nil {
		return Client{}, err
	}
	return newClient(conn), nil
}
func NewClient(address string) (Client, error) {
	port, err := strconv.Atoi(os.Getenv(client.PPSWorkerPortEnv))
	if err != nil {
		return Client{}, err
	}
	conn, err := grpc.Dial(fmt.Sprintf("%s:%d", address, port),
		append(client.DefaultDialOptions(), grpc.WithInsecure())...)
	if err != nil {
		return Client{}, err
	}
	return newClient(conn), nil
}
// NewClient returns a worker client for the worker at the IP address passed in.