default Container.ExecResult execInContainer(String... command)
        throws UnsupportedOperationException, IOException, InterruptedException {
        return execInContainer(StandardCharsets.UTF_8, command);
    }
Run a command inside a running container, as though using "docker exec", and interpreting
the output as UTF8.
<p>
@see #execInContainer(Charset, String...)
core/src/main/java/org/testcontainers/containers/ContainerState.java