The Omnia docs are hosted here: https://omnia-documentation.readthedocs.io/en/latest/index.html and are written in reStructuredText (.rst).
Clone this project
Install or update sphinx (See: https://pip.readthedocs.io/)
pip install sphinx
or:
pip install sphinx --upgrade
Install ReadTheDocs theme:
pip install sphinx_rtd_theme
Build the Docs:
cd omnia/docs make html
View the documentation by pointing a browser to: omnia/docs/build/html/index.html