Get Started with Katalium Framework in Visual Studio Code

This is a companion discussion topic for the original entry at

At this point Katalium Framework extension from Visual Studio Code does not work on linux, mainly Ubuntu.

To make it work, after installing the extension, you need to go to the extension folder:
/home/alex/.vscode/extensions/katalon-llc.katalium-1.0.5 (for Visual Studio Code)
/home/alex/.vscode-oss/extensions/katalon-llc.katalium-1.0.5 (for VSCodium)

and run:
npm install
npm run compile
npm run lint (optional, I think)

Be sure to have node installed.