The Varia website is made with Pelican, a static site generator written in Python. This means that the website is first generated on a computer (using Python, Jinja and Pelican) into a set of html pages, files and images. This set of documents is then uploaded to the server.
The first one, 'plugins', is linked to the offical collection of plugins from the Pelican project '[pelican-plugins](https://github.com/getpelican/pelican-plugins/)'.
Articles are written in a markup language called markdown. [Here](https://daringfireball.net/projects/markdown/syntax) is an overview of the syntax. You can also use the online editor in gitlab to help you.