improve e.g. code in README by replace command with one that works
@@ -80,7 +80,7 @@ final ContainerInfo info = docker.inspectContainer(id);
docker.startContainer(id);
// Exec command inside running container with attached STDOUT and STDERR
-final String[] command = {"bash", "-c", "ls"};
+final String[] command = {"du", "-h", "-s"};
final ExecCreation execCreation = docker.execCreate(
id, command, DockerClient.ExecCreateParam.attachStdout(),
DockerClient.ExecCreateParam.attachStderr());
