First create a new TOC in your config.ftd file.
config.ftd
-- ft.toc-item list examples-toc:
$processor$: toc

- /examples/input/
  Input
- /examples/diagram/
  Architecture Diagram
Then create a new page, with this as starting point.
-- import: ft
-- import: config

-- ft.doc-page:
toc: $config.examples-toc

-- ft.h0: Page Header