Not able to write a file to a docker container from a Java Selenium program

I have the following container up and running on Windows

docker pull selenium/standalone-chrome
docker run -d -p 4444:4444 -v /dev/shm:/dev/shm selenium/standalone-chrome

The program takes screenshot from a website and writes to a docker filesystem but I do not see that file in /dev/shm folder. Nor do I see any error when the program executes.

//Uses Selenium Grid Hub, the browser is running with a Docker container
//docker pull selenium/standalone-chrome
//docker run -d -p 4444:4444 -v /dev/shm:/dev/shm selenium/standalone-chrome
//http://localhost:4444/. It reflects Selenium Grid UI
@Override
public void run(String... args) {
    try {
        ChromeOptions chromeOptions = new ChromeOptions();
        URL url = new URL("http://localhost:4444/wd/hub");
        RemoteWebDriver driver = new RemoteWebDriver(url, chromeOptions);
        driver.get("https://www.scaler.com/topics/");
        log.info("Title: {} ", driver.getTitle());
        pause(5);

        boolean screenshotSuccessFlag = screenshot(driver, "screenshot.png");

        driver.quit();
    } catch (Exception e) {
        log.error("An error occurred: {} ", e.getMessage());
    }
}

private void pause(Integer seconds) {
    try {
        TimeUnit.SECONDS.sleep(seconds);
    } catch (InterruptedException e) {
        log.error("Exception while pausing for {} seconds: ", seconds);
    }
}

private boolean screenshot(WebDriver driver, String pathname) {
    try {
        File src = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
        FileUtils.copyFile(src, new File(pathname));
        return true;
    } catch (IOException e) {
        log.error("Error while taking screenshot: {}", e.getMessage());
        return false;
    }
}