src/front
The front page that appears at:
docs-website/index.html
src/product
The main product documentation, built by sphinx. The output goes to:
docs-website/h2o-docs/index.html
There are also some directories under product from the original h2o-3 pre-sphinx docs build system.
src/booklets/v2_2015
The various booklet latex source code, built by the gradle 'booklets' target. The output goes to:
docs-website/h2o-docs/booklets/