This is the ROS2 documentation site.
Under /source are the source files for the site. In the root directory are the files required to locally build the site for testing.
You must have sphinx installed. On Debian or Ubuntu you can install it using apt:
apt-get install python3-sphinx
For other distributions please refer to http://www.sphinx-doc.org/en/master/usage/installation.html
To build the site just execute:
make html
The site will be generated in the build/html directory. The main page is README.html