Prepare environment for building static html pages

[madryk]

We can use https://www.sphinx-doc.org/en/master/ as a build tool.

Example how sphinx is used in different project: https://github.com/CeON/dataverse/tree/develop/doc/sphinx-guides

We want to be able to build a simple static webpage in jmef project https://github.com/CeON/jmef where we can input some information about jmef format.