GNU/Linux Installing x11docker – Step by step Guide
How to Install x11docker on GNU/Linux Systems – Step by step Tutorial.
And x11docker for Linux is a Tool Script to Run GUI Applications and desktops in docker with Focus on Security.

Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }